Then followed a half-hour’s discussion, between the Doctor and Polynesia on the one side and Chee-Chee on the other, as to whether the find we had made was, or was not, a canoe. For me, I had no opinion. To my eyes the object looked like an immensely long log, hollowed somewhat on the one side, but whether by accident or design I could not tell. In any case it was certainly too heavy and cumbersome for us to use. And presently I edged into the argument with the suggestion that we go on further and find materials for a raft or boat we _could_ handle. The Doctor seemed rather glad of this excuse to end a fruitless controversy, and soon we moved on in search of something which would enable us to explore the waters of the lake. A march of a mile further along the shore brought us to the woods that were not so heavy. Here the immense asparagus forests gave way to a growth of smaller girth; and the Doctor’s hatchet soon felled enough poles for us to make a raft from. We laced them together with thongs of bark and found them sufficiently buoyant when launched to carry us and our small supply of baggage with ease. Where the water was shallow we used a long pole to punt with; and when we wished to explore greater depths we employed sweeps, or oars, which we fashioned roughly with the hatchet. From the first moment we were afloat the Doctor kept me busy taking notes for him. In the equipment he had brought with him there was a fine-meshed landing net: and with it he searched along the shores for signs of life in this moon lake, the first of its kind we had met with. “It is very important, Stubbins,” said he, “to find out what fish we have here. In evolution the fish life is a very important matter.” “What is _evolution_?” asked Chee-Chee. [Illustration: “_We used a long pole to punt with_”] I started out to explain it to him but was soon called upon by the Doctor to make more notes—for which I was not sorry, as the task turned out to be a long and heavy one. Polynesia however took it up where I left off and made short work of it. “Evolution, Chee-Chee,” said she, “is the story of how Tommy got rid of the tail you are carrying—because he didn’t need it any more—and the story of how you grew it and kept it because you _did_ need it. . . . _Evolution!_ Poof!—Professors’ talk. A long word for a simple matter.” It turned out that our examination of the lake was neither exciting nor profitable. We brought up all sorts of water-flies, many larvæ of perfectly tremendous size, but we found as yet no fishes. The plant life—water plant I mean—was abundant. “I think,” said the Doctor, after we had poled ourselves around the lake for several hours, “that there can be no doubt now that the Vegetable Kingdom here is much more important than the Animal Kingdom. And what there is of the Animal Kingdom seems to be mostly insect. However, we will camp on the shore of this pleasant lake and perhaps we shall see more later.”