I am much indebted to you for your glowing communication of July 20th. I had that very day left Concord for the wilds of Maine; but when I returned, August 8th, two out of the six worms remained nearly, if not quite, as bright as at first, I was assured. In their best estate they had excited the admiration of many of the inhabitants of Concord. It was a singular coincidence that I should find these worms awaiting me, for my mind was full of a phosphorescence which I had seen in the woods. I have waited to learn something more about them before acknowledging the receipt of them. I have frequently met with glow-worms in my night walks, but am not sure they were the same kind with these. Dr. [Thaddeus] Harris once describe to me a larger kind than I had found “nearly as bug as your little finger”; but he does not name them in his report.

  The only authorities on Glow-worms which I chance to have (and I am pretty well provided), are Kirby and Spence (the fullest), Knapp (“Journal of a Naturalist”), “The Library of Entertaining Knowledge” (Rennie), a French work, etc., et., but there is no minute, scientific description on any of these. This is apparently female of the genus Lampyris; but Kirby and Spence say that there are nearly two hundred species of this genus alone. The one commonly referred to by English writers is the Lampyris noctiluca; but judging from Kirby and Spence’s description, and from the description and plate in the French work, this is not that one, for besides other differences both say that the light proceeds from the abdomen. Perhaps the worms exhibited by Durkee (whose statement to the Boston Society of Natural History, second July meeting, in the Traveller” of August 12, 1857, I send you) were the same with these. I do not see how they could be the L. noctiluca, as he states.

  I expect to go to Cambridge before long, and if I get any more light on this subject I will inform you. The two worms are still alive.

  I shall be glad to receive the Drosera at any time, if you chance to come across it. I am looking over Loudon’s “Arboretum,” which we have added to our Library, and it occurs to me that it was written expressly for you, and that you cannot avoid placing it on your own shelves.

  I should have been glad to see the whale, and might perhaps have done so, if I had not at that time been seeing “the elephant” (or moose) in the Maine woods. I have been associating for about a month with one Joseph Polis, the chief man of the Penobscot tribe of Indians, and have learned a great deal from him, which I should like to tell you sometime.