Let me also say, my dear sir, that any duplicates you can spare us from your noble institution will be truly acceptable and in the highest degree useful to us, as we have very few exotics and hot-house plants. We have a good gardener, and I think I can promise you that whatever you choose to give us shall be sedulously taken care of. Dr. Torrey is now at Princeton. I had the pleasure of spending a week with him not long since, and hope to visit him again early in the autumn. I shall miss him very much. I am here more favorably situated with respect to books than at New York. I hope next week to begin again with the “Flora,” and perhaps to finish the Monopetalæ. TO GEORGE ENGELMANN. CAMBRIDGE, 26th July, 1842. MY DEAR DOCTOR,--I hope to get settled here, and in working order in a week or so; to work at Compositæ, all next month, and to occupy a part of September and October in collecting the roots and seeds of plants, of the White Mountains, of western New York, etc., for our Botanic Garden here; which I wish to renovate, to make creditable to the country and subservient to the advancement of our favorite science. I wish to see growing here all the hardy and half-hardy plants of the United States (as well as many exotics, etc.), and shall exert myself strenuously for their introduction. The Garden contains seven acres; the trees and shrubs are well grown up; we are free from debt, and have a small fund. The people and the corporation are anxious that we should do something, and I trust will second our efforts. Allow me therefore to say that yourself and your friend Lindheimer[128] in Texas would render me, and also the cause of botany in this country, the greatest aid (which I will take every opportunity of publicly acknowledging), if you will send me roots or seeds of any Western plants, especially the rarer, and those not yet figured or cultivated abroad. But nothing peculiar to the West and South will come amiss. I am calling on all my correspondents to assist me in this matter; which, by giving me the opportunity of examining so many living plants, will vastly increase the correctness of our “Flora.” I shall not be idle myself. I will defray all expenses of collection and transportation (boxes may be sent via New Orleans, directly to me at Boston). If you wish to cultivate anything that I have or can procure, it shall be forthcoming. Pray let me hear from you on this subject. TO JOHN TORREY. CAMBRIDGE, 15th September, 1842.