“There was nothing to be done, of course, but hoist my little flag, union down, and go on with the very interesting task of studying the habits of my new moth, of which I have since found several specimens, besides three cocoons which I am hatching in the hope that they will prove to belong to the species. I’ve been hard at work at that task ever since, and I have made some very interesting discoveries with regard to that moth’s choice of habitat. I made the most important one the night before you arrived. That is why I got no sleep that night.”

“Let us hope,” said Cal, “that the excitement of it did not interfere with your rest last night.”

“Oh, not at all. I am never excited, and I can sleep whenever I choose. I have only to lie down and close my eyes in order to accomplish that.”

“Then you have a shelter or hut up there somewhere—though we saw none?”

“Oh, no. I never sleep under shelter of any kind; I haven’t done so for more than twenty years past. Indeed, that is one of the conditions upon which I live at all. My health is good now, but it would fail me rapidly if I slept anywhere under a roof.”

“But when these heavy subtropical rains come?” asked Dick.

“Ah, I am prepared for them. I have only to spread one rubber cloth on the ground and a much thinner one over my blanket, and I take no harm.”

“Your specialty then is the study of butterflies and moths?” asked Dick.

“No, not at all. Indeed I have no specialty. When I was teaching I held the chair of Natural History, with several specialists as tutors under my general direction. When my health broke down—pray, don’t suppose I am going to weary you with a profitless catalogue of symptoms—I simply had to take to the woods. I had nobody dependent upon me—nobody for whom it was my duty to provide then or later. I had a little money, very little, but living as I do I need very little, and my work yields me a good deal more than I need or want. The little rifle I always have with me provides me with all the food I want, so that I am rarely under expense on that account.”