Once the creatures of the forest held a great convention and appointed a commission consisting of the most illustrious scientists among them to go forth, clear beyond the forest and out into the unknown and unexplored world, to verify the truth of the matters already taught in their schools and colleges and also to make discoveries. It was the most imposing enterprise of the kind the nation had ever embarked in. True, the government had once sent Dr. Bull Frog, with a picked crew, to hunt for a northwesterly passage through the swamp to the right-hand corner of the wood, and had since sent out many expeditions to hunt for Dr. Bull Frog; but they never could find him, and so government finally gave him up and ennobled his mother to show its gratitude for the services her son had rendered to science. And once government sent Sir Grass Hopper to hunt for the sources of the rill that emptied into the swamp; and afterward sent out many expeditions to hunt for Sir Grass, and at last they were successful--they found his body, but if he had discovered the sources meantime, he did not let on. So government acted handsomely by deceased, and many envied his funeral. But these expeditions were trifles compared with the present one; for this one comprised among its servants the very greatest among the learned; and besides it was to go to the utterly unvisited regions believed to lie beyond the mighty forest--as we have remarked before. How the members were banqueted, and glorified, and talked about! Everywhere that one of them showed himself, straightway there was a crowd to gape and stare at him. Finally they set off, and it was a sight to see the long procession of dry-land Tortoises heavily laden with savants, scientific instruments, Glow-Worms and Fire-Flies for signal service, provisions, Ants and Tumble-Bugs to fetch and carry and delve, Spiders to carry the surveying chain and do other engineering duty, and so forth and so on; and after the Tortoises came another long train of ironclads--stately and spacious Mud Turtles for marine transportation service; and from every Tortoise and every Turtle flaunted a flaming gladiolus or other splendid banner; at the head of the column a great band of Bumble-Bees, Mosquitoes, Katy-Dids, and Crickets discoursed martial music; and the entire train was under the escort and protection of twelve picked regiments of the Army Worm. At the end of three weeks the expedition emerged from the forest and looked upon the great Unknown World. Their eyes were greeted with an impressive spectacle. A vast level plain stretched before them, watered by a sinuous stream; and beyond there towered up against the sky along and lofty barrier of some kind, they did not know what. The Tumble-Bug said he believed it was simply land tilted up on its edge, because he knew he could see trees on it. But Professor Snail and the others said: