Naturally, after the little experience of the morning, having received the sealed letters, and having again seen the two men who had acted so roughly toward Jennie, Jack was a little apprehensive as he rode along the trail toward Golden Crossing. There were several places very favorable for holding up a stage coach, had one used the mountain road, but, as has been said, the route was too difficult for a vehicle to traverse.

"Though they might hold me up, more easily than they could a coach if they wanted to," reflected Jack. Consequently he approached all suspicious places with more than his usual caution.

But as he covered mile after mile and nothing happened, he became easier in his mind.

"I guess they aren't going to have a try for us, after all, Sunger," he said to his faithful pony. The plucky creature whinnied in answer, as Jack patted his neck.

"It wouldn't do 'em much good to make us stand and deliver," mused the young express rider. "For Mr. Argent said these letters weren't of prime importance. Still, I wouldn't like to have them taken away from me, or lose them, and get a bad reputation in this business. I don't want to lose my job just now, when dad is laid up."

Jack had feared that the two strangers who had fled in such a hurry from the hotel in Rainbow Ridge, might at least try to annoy him on the road, as they had taken the trail leading up the mountain to Golden Crossing.

But nothing like this happened, and in due time Jack arrived at the other post office and was greeted by Jennie. Jack gave Jennie the message about Mr. Argent's letters, but said nothing to her about having again seen the two men who had annoyed her.

"It would only worry her," he reflected, "and she has worries enough without my adding to them."

Jack remained that night in Golden Crossing, spending a pleasant evening with Aunt Matilda and Jennie. He was off early the next morning for the ride to Rainbow Ridge. Having delivered the mail, and before going to see his father, Jack made some inquiries around the Mansion Hotel about the two strangers who had left so suddenly.

No one knew much about them, except that they had ridden in early the previous morning, and had eaten a hasty breakfast It had been observed that they kept well to themselves, and conversed in low tones.

Then had come the episode of the listening on the part of one, and the flight of both of them. That was really all Jack could learn.

"And as long as you didn't see anything of them on the road," said Mr.
Argent, "I guess you needn't worry. You got my letters off all right?"

"Oh yes."

"Well, now the next thing will be the replies. Watch out for them."

And Jack said he would.

The young pony express rider had a few hours' spare time that day, and he spent them with his father. Mr. Bailey was discouraged at the progress he was making.

"I don't seem to get at all better, Jack," he complained.

"Well, Dad, it takes time, Dr. Brown says," his son observed.

"I know. But it seems as if I ought to get stronger. I want to be back at work."

"Oh, don't worry about that, Dad! I'm on the job, you know. I may not be doing as well as you, but I'm taking the mail and express stuff back and forth, and I haven't heard any complaints yet."

"Then you haven't lost anything, Jack, and nothing has been taken from you?"

"No, Dad. Not a thing."

"And the contents of no important letters have leaked out?"

"Not yet. But I know what you're thinking of, Dad. It's about that
Harrington letter."

"Yes, Jack, I am. I wish I could prove that it wasn't my fault."

"Don't worry, Dad! Your friends know it wasn't your fault, and some day we may be able to prove to your enemies that it wasn't."

"I hope so, Jack, but I've about given up," was the weary answer.

Jack had carefully kept from his father all the little worries that had occurred since the change in the pony express business had been made. He had said nothing about the misplaced planks of the bridge, nor about the two strangers.

"What's the use of worrying dad?" reflected our hero. "He has troubles enough of his own. I'll keep mine to myself."

That afternoon, late, as Jack was waiting at the Golden Crossing post office for the mail, a messenger rode in to say that the stage would be delayed because of a slight accident.

"But the driver wants you to wait," the messenger told Jack, "as there are some important letters to go to Rainbow Ridge, and be forwarded from there on."

"All right, I'll wait," promised Jack.

"It will mean a night ride," suggested Jennie.

"I know it, but it can't be helped. It's part of the game. I'm not afraid."

But when Jack helped Jennie sort the mail a little later, and found among the letters and parcels some large envelopes addressed to Mr. Argent and sealed with red wax, a strange feeling came over him.

"Here are those answers," he thought. "These must be the important papers about the secret mine. And I've got to carry them through on a night ride. Well, I wish they hadn't come just at this time, but there's no help for it. I've got to take them through."

He paused for a moment, with the important letters in his hand.

"What are those?" asked Jennie.

"Oh just some stuff for our town," Jack answered, indifferently.

In a flash he had made up his mind not to tell his cousin of the value and importance of the mail that night. She would worry if she knew what he was carrying along the trail after dark.

And Jack had another plan. He realized that the enemies, or business rivals of Mr. Argent, (call them what you will) might know of the arrival of the documents.

"They may try to get them away from me," reflected Jack. "Now, I've' read somewhere that the best way to throw off suspicion is to make something important look unimportant. That's what I'm going to do."

There were a number of newspapers in the mail. While Jennie was out of the room a moment Jack opened one bundle of papers, folded the red-sealed letters up in one of the papers, put back the wrapper and tossed the package into the pouch he would carry over his saddle.

"There!" he thought. "That doesn't look like anything of value. If I am held up, the thieves will throw away the newspapers anyhow, and I can get them later. I think that's a pretty good scheme, myself."

An hour later Jack was on his way along the mountain trail. It was quite dark, for there was no moon. But Jack laughed and sang as he parted from Jennie. He pretended that his heart was light, though, truth to tell, he was a bit apprehensive.

"Maybe those fellows don't know that the letters have arrived, and, if they do, my newspaper stunt will fool 'em," he decided.

It was near the bridge where once he had so nearly had a serious accident that, as Jack was riding along, he heard a sudden command:

"Halt!"

"Go on, Sunger! Go on!" yelled Jack in his pony's ear, as he slapped the animal on the flank. Then Jack felt himself suddenly attacked, as some one rode up alongside him, and dealt him a blow on the head.