Poor Hunneman died yesterday, after a short illness. I have spent much time evenings with Mr. Valentine, whom I like extremely. Excepting only Brown, he is the best microscopical observer in Great Britain. He cares little, however, for proper systematic botany, for which I am sorry. He has shown me some curious things. I have learned from Brown the character he observed in our species of Rhexia, that is, the true genus Rhexia: the unilocularity of the anthers.... Tuesday evening, March 12.--After a hard day’s work I finished on Monday evening with the Linnæan herbarium, which I found more interesting than I expected and more satisfactory, as it is in really good state, carefully taken care of, etc. I had some very good notes to make. I assure you I feel much gratified to have studied this collection, which, with the Gronovian, enables us to start fair as to Linnæan species. Do you know that Acer saccharinum, Linn., is A. eriocarpum (spec. Kalm)! Look at Linnæus “Species Plantarum” (which you have not, unfortunately, though it is the most necessary of books; you will receive it at the same time as this letter or nearly) and you will find that the description is all drawn from Eriocarpum. I took what time I could to-day for the Gronovian plants and a few of Plukenet’s, etc., but was unable to finish; will go to-morrow, for I shall work to the last moment. I have been tempted to buy a collection of Hartweg’s[76] very fine Mexican plants, which being collected far in the interior of north Mexico are very North American, and quite necessary, I think, for us. They will reach you with the other parcels. Be careful about the little labels with the numbers stuck on. Bentham will publish them presently.... Professor Royle, as the agent of India people, I believe, offers me seeds from Himalaya Mountains, received, and still to be received, from the government collectors, in exchange for those of useful and interesting North American plants, which they are desirous of introducing into India. But as I can’t attend to it until another season, he kindly offers to send to you a portion of the seeds just received, and to ask you to distribute them in such way as will be most useful, and ask those you give them to (say Downing, Hogg, Dr. Wray, Dr. Boykin, etc., and some one in the valley of the Mississippi or Arkansas) to collect seeds of trees, etc. (you can suggest what would be most desirable), and send them to London, whence they will be sent in the mails overland to India. As I fear I shall not see Royle again I shall write him a note, telling him, as I promised, how to send to you. I saw Dr. Sims’ herbarium, at King’s College. I want to look at it to certify a few early “Botanical Magazine” plants.