Halstead, I believe, has nearly decided to go on the Panama Railroad Survey; I trust to get Wright attached to the boundary survey. I have a letter from Fendler, in which he expressed his willingness to go to the Great Salt Lake country, if he can get government protection and food, etc. In a few days I shall write to Marcy; send him the sheets of “Plantæ Fendlerianæ,” and make a vigorous application for this aid. No doubt I shall get it, I think. But perhaps it might be almost as well for Fendler to go over with a party of emigrants directly to Mormon City. But probably there will be emigrants bound for the same place, accompanying the regiment, as near as they go. Fendler can do admirably well in that region, if he perseveres. But will he not take the gold-fever and leave us in the lurch? Will not living, etc., be very dear in Mormon City also? I fear it. I must leave. much to your discretion. Only if you think Fendler has a strong tendency to gold-hunting (which few could resist) let him go. And afterwards, if he chooses to collect plants, very well. Few can withstand the temptation when fairly within the infected region, and we hear the Mormons have found gold also.... February 25, 1849. I have just received from the secretary of war, Mr. Marcy, and inclose to you, what I think will procure all the facilities that Fendler can wish from United States troops. If, as I was informed, the secretary has no right to issue an order for rations to Fendler, he has certainly done the best thing by issuing a recommendation which will, if the commander is favorably disposed, enable him to give all without any order. Indeed, I think we could ask nothing better.... In my haste, and multitude of business, I have shabbily neglected to send the copies of “Plantæ Fendlerianæ” to Hamburg for Braun. And now the Danes have blockaded the Elbe.... I think I shall soon send the smaller things to you by express, and retain the three volumes of “Memoirs” for some opportunity less expensive. We want railroad all the way to St. Louis. I am crowded--overwhelmed--with work. But college work will be over in July, and the second volume of “Genera,” which I am now hard at work on, will soon be printed off; a week more and I shall have finished the copy. I must then work at Exploring Expedition Compositæ, and soon at Fendlerianæ, and (when the sets arrive) at Lindheimer’s, if you wish. I have made a genus of the Texan Rue--between Ruta and Aplophyllum,--e. g., Rutosma. I think there are some good remarks you will like in the second volume of “Genera.” I foresee an unusually good chance to get rid of the college work a year hence, and must therefore try to overhaul the Exploring Expedition plants, so as to get them into some shape, and next year (May or April) go abroad with them, sit down in London and Paris, and work them off. I will then drum up subscribers for Fendler and Lindheimer.