"I, too, find it most interesting and jolly," agreed the hippopotamus, fastening her eyes dreamily on the vegetable vine to see what was coming up next. "I thought I might be on short rations when I came on this voyage, Tandy, but I declare to goodness I've never had such a rich and varied diet in my life. You, too, look fine and strong and much happier than when we met in the jungle. But to get back to the fare—why, today I've had a basket of biscuits, a bushel of beans—"

"And that makes it Bean and Biscuit Day, I suppose," giggled Tandy, remembering Kobo's strange way of dividing up her week. "But look! Listen! Here they come!"

"Ahoy below, Hip Hip OPOTOMUS, AHOY!" roared Samuel Salt jovially from above. "All ready to cast off, my lass?"

"Aye, aye, sir!" grinned Kobo as Samuel and Ato came panting down the rope ladders to the raft. "Move over, Tandy, and make room for the Cook and the Captain!" It took nearly ten minutes to get all the gear and crew aboard and Nikobo looked like some curious deep sea monster when she finally shoved off. Two large baskets were slung from ropes across her back. The pail and bird cage slapped up and down on one hip, the aquarium on the other, and through her collar various fishing rods, nets and poles were stuck like quills on a porcupine.

"Now whatever you do, don't submerge," warned Samuel, holding his tin box for especially fragile specimens high above his chest to keep it dry. "Just slow and steady, m'lass, so we'll have time to observe and admire and make notes of any strange growths and creatures as we ride along."

"Creatures!" exclaimed Tandy, twisting round. He was perched on Nikobo's head, his paints held carefully in his lap. "Would there be any wild animals in a sea forest, Master Salt?"

"Sea Lions, likely," predicted Samuel, peering round eagerly as Nikobo paddled between two slippery barked sea trees into the murmuring forest itself. Except for the fact that the floor of this curious sea wood was the blue and restless sea, it might almost have been a forest ashore. The trees, tall, straight and stately, towered up toward the sky. Staring down into the clear green water, Tandy saw their trunks going down, down, down as far as he could see.

"Rooted in the very ocean bed," marveled Samuel Salt, touching one lovingly as they passed. "What splendid masts these would make, Mates! Avast and belay, Nikobo, I believe I'll just take a cutting or two."

"Ha, ha!" roared Ato, peering over Samuel's shoulder. "So now we're going to grow our own masts."

Samuel himself, leaning far out over Nikobo's back, severed three young shoots from the sea tree and popped them happily into the aquarium. Vines that were really of coral ringed the gigantic trunks like bracelets, and the leaves of the trees were long ribbons of green and silver that whipped and fluttered like banners in the morning breeze.

"What's that?" puzzled Ato as the hippopotamus made her way leisurely between the trees. "Looks like mushrooms, Sammy! Wait, I'll just pick me a few and see." Hooking his heels in Nikobo's harness, Ato began vigorously cutting from the trunk of one of the trees the colored fungus growths which sprouted in great profusion just above the water line. Nikobo bravely offered to sample some, and after waiting anxiously to see whether they would have any ill effects the ship's cook decided they were harmless and joyfully filled one of the baskets. The only specimens that really interested Ato were of the edible variety. While he was thus employed, Tandy, an experienced climber by now, scurried up to the top of one of the sea trees, breaking off several branches so Samuel could press the curious leaves in his album. High above his head Tandy could see Roger chasing angrily after a flying fish, muttering with anger at his unsuccessful efforts to overtake the nimble little sea bird. In our own southern waters there are large flying fish that leap out of the water of the gulf stream, but the flying fish in this Nonestic Sea Forest were small, and where most fish have gills wore strong transparent wings. Their claws, somewhat like a crab's, made it possible for them to perch jauntily in the branches of the sea trees, and these strange little fellows could swim and dive as well as fly. Pulling out his pad, Tandy made a lively sketch of one in the tree opposite, for it did look as if Roger would never succeed in catching one.

All morning Nikobo paddled calmly through the dreamy sea forest; Samuel making notes, Tandy sketches, and Ato catching in his long-handled nets plump little fish and crabs, and filling another basket with the small delicious clams that clung like barnacles to the slippery bark of the sea trees. In the shadowy center of the forest where the trees pressed closer together and great flat rocks stuck their heads out of the water, the explorers came upon several fierce sea lions. They were not smooth and shiny like the seals of our own oceans, but yellow and tawny with long yellow tusks, tufted tails and scaly manes. Their front legs ended in sharp claws, their back legs were shorter and their feet were webbed for swimming. Only the fact that Nikobo was larger and more frightening to the sea lions than they were to her saved the party from a savage attack by these malicious-looking monsters. As it was, they retired sullenly into the deeper shadows, snarling and roaring defiance as they backed away, but not before Tandy had made an effective sketch of the whole group.

"'Tis a lucky thing for us that you're along!" grunted Ato, drawing his feet up out of the water and looking with grim disfavor after the snarling sea lions. "Likely as not, if you had not made that picture, Samuel would have tried to drag one along by its tail, regardless of our feelings or safety."

"A wild maned sea lion would be a valuable addition to any collection," sighed Samuel Salt, shaking his head regretfully. "But then—" he grinned in his sudden pleasant way, "not much of a mascot at that."

The only other happening of note was Roger's capture of a monkey fish. Unable to overtake a flying fish, the Read Bird had pounced on this small combination of a land and water beast as it sat quietly sunning itself on the limb of a tree. Screaming and chattering, he bore it proudly down to the Captain, and Samuel was so pleased with the curious little creature that when Nikobo suggested going back he made no serious objection. And as the hippopotamus, rather weary from her long swim, headed thankfully back for the ship Tandy and Samuel made ambitious plans for the monkey fish's care and comfort.