(If you use any portion of these notes, please give credit to me, Lois Sorensen, and to other sources as noted herein.)
In the 1870 Federal Census, D. C. Remington is age 51, a carpenter, at Williamsons Valley, Yavapai, AZ Territory.
In the 1880 Federal Census, Darius C. Remington is age 61, D, and a watchman, living at Signal, Mohave, AZ Territory.
Around 1894 or 1895 he was admitted to the western branch of the National Home for Disabled Volunteer Soldiers, which had opened in West Los Angeles, CA, in 1888. (for the history of this facility see: http://www.valaro.com/rohistory/ROHistory.htm)
Some information on Darius and his siblings was provided by Kay Larsen, a descendant of Oliver Thurston Remington.