Naturalist and zoologist Walter Koelz traveled to Iran on a project of plant exploration (sponsored by the U.S. Department of Agriculture) from late 1939 to early 1941. With him were three companions: Rup Chand, Wangyel, and Rinchen Gialtsen. Together they brought back 3000 seed samples, 4000 herbarium specimens, and a collection of bird skins. Koelz’s diary of that journey is presented in this volume, with an introduction by Henry T. Wright. Includes dozens of black and white photos.