I reply early to your kind letter of October 30th to assure you that I shall with much pleasure contribute so far as I have opportunity to the new Botanical Museum, which, under your charge, and with your great opportunities for obtaining things from every part of the world, will soon become a magnificent collection. I have already several things to send you, such as two very large entwined stems of Aristolochia Sipho, which I brought from the mountains of Carolina.; a Dasylirion from Texas, etc. I have some time ago made arrangements for getting curious stems from Para, through a friend in Salem, who will also incite the masters and supercargoes of ships from that port which trade with various out-of-the-way parts of the world. The first things sent from Para were slabs rather than truncheons of wood (all ordinary exogenes), but I am promised palm stems and woody climbers, of which I shall take a portion to build up our general Natural History Museum at Cambridge, which with the zeal of Agassiz and Wyman is now likely to grow; the rest I will send to you. If you will send me a few duplicates of your circular, I will have them placed in proper hands where they may turn to good account. I am delighted to hear such pleasant things of Dr. Hooker, which I had also heard last summer from Mrs. McGilvray. I owe him a letter, but it is too late to send my congratulations, now that he is probably far on the way to India. I admire his zeal and energy, and wish him an excellent time and a prosperous return. The government has behaved most handsomely in affording him such important aid in his undertaking. Proper specimens of maple sugar will keep perfectly well if placed in a glass jar with a closed cover. I will surely send some in the spring. TO GEORGE ENGELMANN. CAMBRIDGE, December 20, 1847. I got a parcel from New York on Saturday evening, containing a few welcome plants of Wislizenus’[152] collection, and a set of Fendler’s from Santa Fé, up to Rosaceæ. The specimens are perfectly charming! so well made, so full and perfect. Better never were made. In a week I shall take them right up to study, and they are Rocky Mountain forms of vegetation entirely, so I can do it with ease and comfort. It is a cool region that, and dry. If these come from the plains, what will the mountains yield? Fendler must go back, or a new collector, now that order is restored there. All Fendler’s collection will sell at once, no fear, such fine specimens and so many good plants. Pity that F. did not know enough to leave out some of the common plants, except two or three specimens for us, and bestow the same labor on the new plants around him. Send on the rest soon. Yours cordially, A. GRAY. TO CHARLES WRIGHT. CAMBRIDGE, January 17, 1848.