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 a long 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 Prof. Snail and the others said:
"You are hired to dig, sir—that is all. We need your muscle, not your brains. When we want your opinion on scientific matters, we will hasten to let you know. Your coolness is intolerable, too—loafing about here meddling with august matters of learning, when the other labourers are pitching camp. Go along and help handle the baggage."
The Tumble-Bug turned on his heel uncrushed, unabashed, observing to himself, "if it isn't land tilted up, let me die the death of the unrighteous."
Professor Bull Frog, (nephew of the late explorer,) said he believed the ridge was the wall that enclosed the earth. He continued:
"Our fathers have left us much learning, but they had not travelled far, and so we may count this a noble, new discovery. We are safe for renown, now, even though our labours began and ended with this single achievement. I wonder what this wall is built of? Can it be fungus? Fungus is an honourable good thing to build a wall of."
Professor Snail adjusted his field-glass and examined the rampart critically. Finally he said:
