Tam was not infallible, and the working out of his great "thochts" did not always justify the confidence which he reposed in them. His idea of an "invisible aeroplane," for example, which was to be one painted sky blue that would "hairmonise wi' the blaw skies," was not a success, nor was his scheme for the creation of artificial clouds attended by any encouraging results. But Tam's "Attack Formation for Bombing Enemy Depots" attained to the dignity of print, and was confidentially circulated in French, English, Russian, Italian, Serbian, Japanese and Rumanian.

The pity is that a Scottish edition was not prepared in Tam's own language; and Captain Blackie, who elaborated Tam's rough notes and condensed into a few lines Tam's most romantic descriptions, had suggested such an edition for very private circulation.

It would have begun somewhat like this:

"The Hoon or Gairman is a verra bonnie fichter, but he has nae ineetiative. He squints oop in the morn an' he speers a fine machine ower by his lines.

"'Hoot!' says he, 'yon wee feller is Scottish, A'm thinkin'—go you, Fritz an' Hans an' Carl an' Heinrich, an' strafe the puir body.'

"'Nay,' says his oonder lootenant. 'Nein,' he says, 'ye daunt knaw what ye're askin', Herr Lootenant.'

"'What's wrong wi' ye?' says the oberlootenant. 'Are ye Gairman heroes or just low-doon Austreens that ye fear ain wee bairdie?'

"'Lootenant,' say they, 'yon feller is Tam o' the Scoots, the Brigand o' the Stars!'

"'Ech!' he says. 'Gang oop, ain o' ye, an' ask the lad to coom doon an' tak' a soop wi' us—we maun keep on the recht side o' Tam!'"

All this and more would have gone to form the preliminary chapter of the true version of Tam's code of attack.

"He's a rum bird, is Tam," said Captain Blackie at breakfast; "he brought down von Zeidlitz yesterday."

"Is von Zeidlitz down?" demanded half a dozen voices, and Blackie nodded.

"He was a good, clean fighter," said young Carter regretfully. "When did you hear this, sir?"

"This morning, through H. Q. Intelligence."

"Tam will be awfully bucked," said somebody. "He was complaining yesterday that life was getting too monotonous. By the way, we ought to drop a wreath for poor old von Zeidlitz."

"Tam will do it with pleasure," said Blackie; "he always liked von Zeidlitz—he called him 'Fritz Fokker' ever since the day von Zeidlitz nearly got Tam's tail down."

An officer standing by the window with his hands thrust into his pockets called over his shoulder:

"Here comes Tam."

The thunder and splutter of the scout's engine came to them faintly as Tam's swift little machine came skimming across the broad ground of the aerodrome and in a few minutes Tam was walking slowly toward the office, stripping his gloves as he went.

Blackie went out to him.

"Hello, Tam—anything exciting?"

Tam waved his hand—he never saluted.

"Will ye gang an' tak' a look at me eenstruments?" he asked mysteriously.

"Why, Tam?"

"Will ye, sir-r?"

Captain Blackie walked over to the machine and climbed up into the fuselage. What he saw made him gasp, and he came back to where Tam was standing, smug and self-conscious.

"You've been up to twenty-eight thousand feet, Tam?" asked the astonished Blackie. "Why, that is nearly a record!"

"A' doot ma baromeeter," said Tam; "if A' were no' at fochty thousand, A'm a Boche."

Blackie laughed.

"You're not a Boche, Tam," he said, "and you haven't been to forty thousand feet—no human being can rise eight miles. To get up five and a half miles is a wonderful achievement. Why did you do it?"

Tam grinned and slapped his long gloves together.

"For peace an' quiet," he said. "A've been chased by thairty air Hoons that got 'twixt me an' ma breakfast, so A' went oop a bit an' a bit more an' two fellers came behint me. There's an ould joke that A've never understood before—'the higher the fewer'—it's no' deefficult to understand it noo."

"You got back all right, anyhow," said Blackie.

"Aloon i' the vast an' silent spaces of the vaulted heavens," said Tam in his sing-song tones which invariably accompanied his narratives, "the Young Avenger of the Cloods, Tam the Scoot, focht his ficht. Attacked by owerwhelmin' foorces, shot at afore an' behint, the noble laddie didna lose his nairve. Mutterin' a brief—a verra brief—prayer that the Hoons would be strafed, he climbt an' climbt till he could 'a' strook a match on the moon. After him wi' set lips an' flashin' een came the bluidy-minded ravagers of Belgium, Serbia an'—A'm afreed—Roomania. Theer bullets whistled aboot his lugs but,

"That's a wee poem A' made oop oot o' ma ain heid, Captain, at a height of twenty-three thoosand feet. A'm thinkin' it's the highest poem in the wairld."

"And you're not far wrong—well, what happened?"

"A' got hame," said Tam grimly, "an' ain o' yon Hoons did no' get hame. Mon! It took him an awfu' long time to fa'!"

He went off to his breakfast and later, when Blackie came in search for him, he found him lying on his bed smoking a long black cigar, his eyes glued to the pages of "Texas Tom, or the Road Agent's Revenge."

"I forgot to tell you, Tam," said Captain Blackie, "that von Zeidlitz is down."

"Doon?" said Tam, "'Fritz Fokker' doon? Puir laddie! He were a gay fichter—who straffit him?"

"You did—he was the man you shot down yesterday."

Tam's eyes were bright with excitement.

"Ye're fulin' me noo?" he asked eagerly. "It wisna me that straffit him? Puir auld Freetz! It were a bonnie an' a carefu' shot that got him. He wis above me, d'ye ken? 'Ah naw!' says I. 'Ye'll no try that tailbitin' trick on Tam,' says I; 'naw, Freetz—!' An' I maneuvered to miss him. I put a drum into him at close range an' the puir feller side-slippit an' nose-dived. Noo was it Freetz, then? Weel, weel!"

"We want you to take a wreath over—he'll be buried at Ludezeel."

"With the verra greatest pleasure," said Tam heartily, "and if ye'll no mind, Captain, A'd like to compose a wee vairse to pit in the box."

For two hours Tam struggled heroically with his composition. At the end of that time he produced with awkward and unusual diffidence a poem written in his sprawling hand and addressed:

"I'll read you the poem, Captain Blackie, sir-r," said Tam nervously, and after much coughing he read:

"A've signed it, 'Kind regards an' deepest sympathy wi' a' his loved ains,'" said Tam. "A' didna say A' killit him—it would no be delicate."

The wreath in a tin box, firmly corded and attached to a little parachute, was placed in the fuselage of a small Morane—his own machine being in the hands of the mechanics—and Tam climbed into the seat. In five minutes he was pushing up at the steep angle which represented the extreme angle at which a man can fly. Tam never employed a lesser one.

He had learnt just what an aeroplane could do, and it was exactly all that he called for. Soon he was above the lines and was heading for Ludezeel. Archies blazed and banged at him, leaving a trail of puff balls to mark his course; an enemy scout came out of the clouds to engage him and was avoided, for the corps made it a point of honor not to fight when engaged on such a mission as was Tam's.

Evidently the enemy scout realized the business of this lone British flyer and must have signaled his views to the earth, for the anti-aircraft batteries suddenly ceased fire, and when, approaching Ludezeel, Tam sighted an enemy squadron engaged in a practise flight, they opened out and made way for him, offering no molestation.

Tam began to plane down. He spotted the big white-speckled cemetery and saw a little procession making its way to the grounds. He came down to a thousand feet and dropped his parachute. He saw it open and sail earthward and then some one on the ground waved a white handkerchief.

"Guid," said Tam, and began to climb homeward.

The next day something put out of action the engine of that redoubtable fighter, Baron von Hansen-Bassermann, and he planed down to the British aerodrome with his machine flaming.

A dozen mechanics dashed into the blaze and hauled the German to safety, and, beyond a burnt hand and a singed mustache, he was unharmed.

Lieutenant Baron von Hansen-Bassermann was a good-looking youth. He was, moreover, an undergraduate of Oxford University and his English was perfect.

"Hard luck, sir," said Blackie, and the baron smiled.

"Fortunes of war. Where's Tam?" he asked.

"Tam's up-stairs somewhere," said Blackie. He looked up at the unflecked blue of the sky, shading his eyes. "He's been gone two hours."

The baron nodded and smiled again.

"Then it was Tam!" he said. "I thought I knew his touch—does he 'loop' to express his satisfaction?"

"That's Tam!" said a chorus of voices.

"He was sitting in a damp cloud waiting for me," said the baron ruefully. "But who was the Frenchman with him?"

Blackie looked puzzled.

"Frenchman? There isn't a French machine within fifty miles; did he attack you, too?"

"No—he just sat around watching and approving. I had the curious sense that I was being butchered to make a Frenchman's holiday. It is curious how one gets those quaint impressions in the air—it is a sort of ninth sense. I had a feeling that Tam was 'showing off'—in fact, I knew it was Tam, for that reason."

"Come and have some breakfast before you're herded into captivity with the brutal soldiery," said Blackie, and they all went into the mess-room together, and for an hour the room rang with laughter, for both the baron and Captain Blackie were excellent raconteurs.

Tam, when he returned, had little to say about his mysterious companion in the air. He thought it was a "French laddie." Nor had he any story to tell about the driving down of the baron's machine. He could only say that he "kent" the baron and had met his Albatross before. He called him the "Croon Prince" because the black crosses painted on his wings were of a more elaborate design than was usual.

"You might meet the baron, Tam," said the wing commander. "He's just off to the Cage, and he wants to say 'How-d'-ye-do.'"

Tam met the prisoner and shook hands with great solemnity.

"Hoo air ye, sir-r?" he asked with admirable sang-froid. "A' seem to remember yer face though A' hae no' met ye—only to shoot at, an' that spoils yeer chance o' gettin' acquainted wi' a body."

"I think we've met before," said the baron with a grim little smile. "Oh, before I forget, we very much appreciated your poem, Tam; there are lines in it which were quite beautiful."

Tam flushed crimson with pleasure.

"Thank ye, sir-r," he blurted. "Ye couldna' 'a' made me more pleased—even if A' killit ye."

The baron threw back his head and laughed.

"Good-by, Tam—take care of yourself. There's a new man come to us who will give you some trouble."

"It's no' Mister MacMuller?" asked Tam eagerly.

"Oh—you've heard of Captain MÜller?" asked the prisoner interestedly.

"Haird?—good Lord, mon—sir-r, A' mean—look here!"

He put his hand in his pocket and produced a worn leather case. From this he extracted two or three newspaper cuttings and selected one, headed "German Official."

"'Captain Muller,'" read Tam, "'yesterday shot doon his twenty-sixth aeroplane.'"

"That's MÜller," said the other carefully. "I can tell you no more—except look after yourself."

"Ha'e na doot aboot that, sir-r," said Tam with confidence.

He went up that afternoon in accordance with instructions received from headquarters to "search enemy territory west of a line from Montessier to St. Pierre le Petit."

He made his search, and sailed down with his report as the sun reached the horizon.

"A verra quiet joorney," he complained, "A' was hopin' for a squint at Mr. MacMuller, but he was sleeping like a doormoose—A' haird his snoor risin' to heaven an' ma hairt wis sick wi' disappointed longin'. 'Hoo long,' A' says, 'hoo long will ye avoid the doom Tam o' the Scoots has marked ye doon for?' There wis naw reply."

"I've discovered Tam's weird pal," said Blackie, coming into the mess before lunch the next day. "He is Claude Beaumont of the American Squadron—LefÈvre, the wing commander, was up to-day. Apparently Beaumont is an exceedingly rich young man who has equipped a wing with its own machines, hangars and repair-shop, and he flies where he likes. Look at 'em!"

They crowded out with whatever glasses they could lay their hands upon and watched the two tiny machines that circled and dipped, climbed and banked about one another.

First one would dart away with the other in pursuit, then the chaser, as though despairing of overtaking his quarry, would turn back. The "hare" would then turn and chase the other.

"Have you ever seen two puppies at play?" asked Blackie. "Look at Tam chasing his tail—and neither man knows the other or has ever looked upon his face! Isn't it weird? That's von Hansen-Bassermann's ninth sense. They can't speak—they can't even see one another properly and yet they're good pals—look at 'em. I've watched the puppies of the pack go on in exactly the same way."

"What is Tam supposed to be doing?"

"He's watching the spotters. Tam will be down presently and we'll ask David how he came to meet Jonathan—this business has been going on for weeks."

Tam had received the recall signal. Beneath him he saw the two "spotters" returning home, and he waved his hand to his sporting companion and came round in a little more than twice his own length. He saw his strange friend's hand raised in acknowledgment, and watched him turn for the south. Tam drove on for a mile, then something made him look back.

Above his friend was a glittering white dragon-fly, and as he looked the fly darted down at the American tail.

"Missed him!" said Tam, and swung round. He was racing with the wind at top speed and he must have been doing one hundred and twenty miles an hour, but for the fact that he was climbing at the extreme angle. He saw the dragon-fly loop and climb and the American swing about to attack.

But his machine was too slow—that Tam knew. Nothing short of a miracle could save the lower machine, for the enemy had again reached the higher position. So engrossed was he with his plan that he did not see Tam until the Scot was driving blindly to meet him—until the first shower from Tam's Lewis gun rained on wing and fuselage. The German swerved in his drive and missed his proper prey. Tam was behind him and above him, but in no position to attack. He could, and did fire a drum into the fleeing foeman, but none of the shots took effect.

"Tairn him, Archie!" groaned Tam, and as though the earth gunners had heard his plea, a screen of bursting shrapnel rose before the dragon-fly. He turned and nose-dived with Tam behind him, but now his nose was for home, and Tam, after a five-mile pursuit, came round and made for home also. Near his own lines he came up with the circling "Frenchman" and received his thanks—four fingers extended in the air—before the signaler, taking a route within the lines, streaked for home.

"Phew!" said Tam, shaking his head.

"Who were you chasing?" asked Blackie. "He can go!"

"Yon's MacMuller," said Tam, jerking his thumb at the eastern sky. "He's a verra likeable feller—but a wee bit too canny an' a big bit too fast. Captain Blackie, sir-r, can ye no get me a machine that can flee? Ma wee machine is no' unlike a hairse, but A'm wishfu' o' providin' the coorpse."

"You've got the fastest machine in France, Tam," said the captain.

Tam nodded.

"It's verra likely—she wis no' runnin' so sweet," he confessed. "But, mon! That Muller! He's a braw Hoon an' A'm encouraged by the fine things that the baron said aboot ma poetry. Ech! A've got a graund vairse in ma heid for Mr. Muller's buryin'! Hae ye a seegair aboot ye, Captain Blackie? A' gave ma case to the Duke of Argyle an' he has no' retairned it."