Our time in Tasmania was too limited to admit of an exploration then. But although we were perfectly aware that the summits of the Tasmanian Alps are inaccessible, we certainly should have attempted to gain them had not the time set for our departure arrived before we had completed the investigation for which we were sent. One relic, however, I carried away with me. It was a single greenish bronzed feather, found high up in the mountains by a native, and sold to me for a somewhat large sum of money. Darwin believed the ux to be covered with greenish plumage; Wallace was too far away to observe the color of the great birds; but all the natives of Tasmania unite in affirming that the plumage of the ux is green. It was not only the color of this feather that made me an eager purchaser, it was the extraordinary length and size. I knew of no living bird large enough to wear such a feather. As for the color, that might have been tampered with before I bought it, and, indeed, testing it later, I found on the fronds traces of sulphate of copper. But the same thing has been found in the feathers of certain birds whose color is metallic green, and it has been proven that such birds pick up and swallow shining bits of copper pyrites. Why should not the ux do the same thing? Still, my only reason for believing in the existence of the bird was this single feather. I had easily proved that it belonged to no known species of bird. I also proved it to be similar to the tail-feathers of the ux-skin in Antwerp. But the feathers on the Antwerp specimen were gray, and the longest of them was but three feet in length, while my huge, bronze-green feather measured eleven feet from tip to tip. One might account for it supposing the Antwerp skin to be that of a young bird, or of a moulting bird, or perhaps of a different sex from the bird whose feather I had secured. Still, these ideas were not proven. Nothing concerning the birds had been proven. I had but a single fact to lean on, and that was that the feather I possessed could not have belonged to any known species of bird. Nobody but myself knew of the existence of this feather. And now I meant to cable to Bronx Park for it, and to place this evidence at the disposal of the beautiful Countess d'Alzette. My cigar had gone out, as I sat musing, and I relighted it and resumed my reading of the type-written notes, lazily, even a trifle sceptically, for all the evidence that she had been able to collect to substantiate her theory of the existence of the ux was not half as important as the evidence I was to produce in the shape of that enormous green feather. I came to the last paragraph, smoking serenely, and leaning back comfortably, one leg crossed over the other. Then, suddenly, my attention became riveted on the words under my eyes. Could I have read them aright? Could I believe what I read in ever-growing astonishment which culminated in an excitement that stirred the very hair on my head?