The following data is extracted from A Standard History of Kansas and Kansans.
Henry Inman was well known both as an officer in the United States army and an author dealing with subjects of the Western plains. He was born in the City of New York on July 3, 1837, of Dutch and Huguenot ancestry. In 1857 he was commissioned second lieutenant in the United States army and was sent to the Pacific coast. On October 22, 1861, he married Eunice C. Dyer of Portland, Maine, where her father, Joseph W. Dyer, was a well known ship builder. During the Civil war Lieutenant Inman served as an aide on the staff of General George Sykes, and on February 11, 1869, was brevetted lieutenant colonel. After the war he won distinction as a magazine writer, his "Old Santa Fe Trail," "Great Salt Lake Trail," "The Ranch on the Oxhide" and other similar books dealing with the subjects he knew so well having a sure and attractive touch. Colonel Inman left a number of unfinished manuscripts at his death in Topeka, November 13, 1899.
Source: A Standard History of Kansas and Kansans