I am the 2d Great Granddaughter of Edward C. Darlington (b.1819) who was the father of Katherine L. Darlington (b.1847). Katherine married John Oliver Johnson(b.1846). Katherine and John had a daughter Elizabeth E. Johnson (b.1877), who married William A. Smith (b.1869). William and Elizabeth had a son John Oliver Smith(b.1910) who was my father..
William was a Civil Engineer at the Portsmouth Naval Shipyard in Norfolk, Virginia and appears in the 1920 Federal Census as residing in Portsmouth. His wife is listed in the 1930 Federal Census as a Widow.
I also have assembled much information on the Darlington's and would appreciate any details anyonecould come up with on any of the other surnames I mentioned.