"I—I will be faithful," said the girl, in a low voice.
"I do not doubt you, my child," he said; "nor you, Gilland. And so I am going to tell you this much now—more, I hope, later."
And he sat up straight, lifting an impressive forefinger.
"Mr. Rowan, lately an officer of our Coast Survey, wrote me a letter from the Holland House in New York—a letter so strange that, on reading it, I immediately repaired to his hotel, where for hours we talked together.
"The result of that conference is this expedition.
"I have now been here two months, and I am satisfied of certain facts. First, there do exist in this unexplored wilderness certain forms of life which are solid and palpable, but transparent and practically invisible. Second, these living creatures belong to the animal kingdom, are warm-blooded vertebrates, possess powers of locomotion, but whether that of flight I am not certain. Third, they appear to possess such senses as we enjoy—smell, touch, sight, hearing, and no doubt the sense of taste. Fourth, their skin is smooth to the touch, and the temperature of the epidermis appears to approximate that of a normal human being. Fifth and last, whether bipeds or quadrupeds I do not know, though all evidence appears to confirm my theory that they walk erect. One pair of their limbs appear to terminate in a sort of foot—like a delicately shaped human foot, except that there appear to be no toes. The other pair of limbs terminate in something that, from the single instance I experienced, seemed to resemble soft but firm antennæ or, perhaps, digitated palpi—"
"Feelers!" I blurted out.
"I don't know, but I think so. Once, when I was standing in the forest, perfectly aware that creatures I could not see had stealthily surrounded me, the tension was brought to a crisis when over my face, from cheek to chin, stole a soft something, brushing the skin as delicately as a child's fingers might brush it."
"Good Lord!" I breathed.
A care-worn smile crept into his eyes. "A test for nerves, you think, Mr. Gilland? I agree with you. Nobody fears what anybody can see."