"We should have been grilled, sir," returned the professor, "but for the fact that we are coated, and our clothing impregnated, with my anti-temperature fluid."

"These Mercurials appear to stand the heat pretty well," I remarked.

"Covered, as we are, with the anti-temperature compound," he returned, "it is impossible for us to judge, even approximately, of the degree of heat that obtains in these sub-Mercurial regions. Naturally it must be very much less than prevails on the surface of the planet, and yet, even at that, if left unprotected we should probably be shriveled to cinders."

"Hardly, professor," I ventured to protest. "Those fields"—and I waved my paddle toward the open country—"are growing rank with a white herb, which is evidently cooked in these ovens and served for food. Quite likely we are eating of it now, and very good eating I find it. However, the point I wish to make is this: If the heat was so intense as you surmise, those fields would be wilted and dried up."

"Nature, Mr. Munn," answered the professor, "adapts itself to every condition. On our own planet we see how life and comfort are rendered possible in every zone from the farthest north to the tropics; and this same adaptability of intelligent creatures to their environment, we may be sure, proceeds throughout the universe. These one-eared, one-eyed, diminutive creatures are formed in the manner best calculated to afford them comfort and happiness amid these surroundings. And, as with them, so with the products of their husbandry."

"You could argue a squirrel out of a tree, professor," said I, with whole-souled admiration. "I am sorry I did not take a course of scientific training, for it would have helped me immensely in my business. A burglar should be an all-around man. If I ever return to Terra——"

"So long as you feel as you do regarding your odious profession, Mr. Munn," broke in the professor, compressing his lips, "you will never return to Terra."

"A return is possible?" I asked, hiding the wonder his words aroused.

"Anything is possible."

"How about the millionaires? Are they to return provided the means are at hand?"