Born: October 16, 1840, Framingham, Massachusetts.
Died: June 7, 1929, Berkeley, California.
Buried: Edgell Grove Cemetery and Mausoleum, Framingham, Massachusetts.
Hosmer graduated from Harvard University and Harvard Divinity School, and became a Unitarian minister.
He served in Northboro, Massachusetts; Quincy, Illinois; St. Louis, Missouri; and Berkeley, California.
He was a recognized authority on hymnody, and taught the subject at Harvard Divinity School.
In 1880 and 1911, he helped produce editions of Unity Hymns and Carols. His other works include: