Incoming correspondence to George Engelmann from Asa Gray, for 1846-1850. The correspondence relates to August Fendler and Santa Fe and government expeditions; Fendler's problems; Wright on the Rio Grande with Capt. Veatch; problems with other collection trips and army; Asclepias and Euphorbia mss..; Gray's journey to Europe; Publication of Wright's 1852 cacti. Henry and the Smithsonian; Oakes' death; Rafinesque, Agassiz, Wislizenus' Texas collections; Nuttall; Thos. Bancroft - Lowell's agent; J. P. Laubouisse, Mr. Olney, Fielding, Tuckerman, Boott, Holstead - Panama Railroad Survey; Fendler's prospective Salt Lake trip with Capt. Strausberg; Mercy - Secretary of War and Col. Albert - head of Topog. Eng. and Fendler; Endlicher's death; Schlechtendal and Pastor Scheele, Berlandier, Lindley, Sprague - artist, Harvey, Webb, Hohenbacher, Riehl, J. P. Brace (took silkworm eggs to Texas); Gregg's death, Emory in St. Antonio.

Folder contains original letters.