Background
Harmon was born in Conneaut Pennsylvania, the son of Jesse Pierce Harmon and Annie Barnes, he married Elmeda Stringham in 1846.
Harmon was born in Conneaut Pennsylvania, the son of Jesse Pierce Harmon and Annie Barnes, he married Elmeda Stringham in 1846.
He was devoted to his religion and was an industrious and multitalented builder who constructed sawmills, a cotton gin, pony express roads, furniture, wagons, and worked as blacksmith and other trades. He is often remembered for building an early version of the modern odometer, using the design of William Clayton and Orson Pratt. Harmon kept a detailed journal of his trek west and his mission to England that has been published.