Edwin Graham Cooper and Ellen (Nellie) Elizabeth were twins.  They were both born on April 25, 1843. 

Edwin G. Cooper died on Feb. 27, 1865.  Henry Harrison Ford wrote in his letter that "Edwin G. Cooper died in 1865 and was buried in the old Colorado City graveyard situated on the present site of Colorado Springs, a little south of the Antlers Hotel. At that time I do not think there was a tree or board or stick of timber on all of the plate of country Colorado Springs now occupies except at the graveyard and along Monument Creek, and not over five hundred people in all of this section south of divide, twenty five miles north of here. "

(Divide, Colorado Divide is an unincorporated town and a U.S. Post Office in Teller County, Colorado, United States.  )