Elliot S.N. Morgan was born in Pittsburgh, Pennsylvania, January, 1832. He was educated in the public schools of Pittsburgh and Newcastle. Morgan spent two years as a clerk in his father's store. He was a member of the Republican Party and was elected to the State Legislature from Lawrence County, Pennsylvania in 1873; reelected in 1874 and 1876. E.S.N. Morgan was appointed Secretary of Wyoming Territory by President Hayes, March 15, 1880 and reappointed, March 31, 1884, by President Arthur. Morgan held that position until 1887. He was the only acting Governor during Territorial period; in which capacity he served upon the death of Governor Hale from January 13, 1885, until February 28, 1885, a period of forty-six days. Morgan again served as acting Governor from December 20, 1886 to January 24, 1887, following Governor Baxter's resignation. After the expiration of his term, E.S.N. Morgan remained in Cheyenne to practice law, being admitted to the Wyoming bar in 1887. He was a member of the Wyoming Constitutional Convention from Laramie County in 1889. E.S.N. Morgan died April 20, 1894, at his home in Cheyenne, Wyoming.