Eupatorium Engelmannianum, sp. nov. Am. Bor., semina misit Engelmann. Can this be it, think you? If so pray help me to it; and to anything else you can, as I mean to give addenda et corrigenda to the Compositæ at the end of the order, if I ever get through this formidable job. No wonder seven years’ labor at them ruined De Candolle’s health. You know he is dead? He died the 9th or 10th of September last.... I send you my article in the January number of “Silliman’s Journal” with a little one by Sullivant,--by mail. I am extremely busy this winter, but I hope always to answer your letters promptly, and to attend to your desires as well as I can, whence I beg you to continue your useful correspondence. March 30, 1842. It is not a great while since I got all the copy ready for the number of the “Flora” now printing,--during which I could do little else. Immediately this was done I completed an arrangement with my publishers for preparing a handsomely got up Introduction or Text-Book of Botany, for schools, lectures, private students (medical, etc.), which must be out on the 1st of May next. Owing to illness I have as yet written almost nothing, and besides have to superintend all the drawings, as they must be made by a person unacquainted with botany; and at the same time I have to correct the proofs of about thirteen sheets yet of the “Flora,” so that I am almost distracted when I think how I am to accomplish it here, where I have to see personally to almost every detail. But I must do it, as I hope to lay the foundation for a popular and--what is of consequence to me--a profitable work. TO W. J. HOOKER. NEW YORK, 30th March, 1842. The last steamship left Boston so soon after I received your kind letter that I was unable to answer it by that conveyance. I intended to send this by the Columbia steamer of the 2d prox.; but I learn that having broken her shaft in the outward voyage she is to sail back to England; when it comes to canvas I have more confidence in our old liners, and therefore send by New York packet. Have you not seen or heard of Nuttall yet? He sailed for England on Christmas last, to take possession of property left him by some deceased relatives.