Hi, I don't have andy Blakslee, (my Litchfield connection is Osborne) but when I saw you said Ohio and then Washington, D.C. - well, it made me wonder if it wasn't Washington County, Ohio?
http://resources.rootsweb.ancestry.com/USA/OH/Washington/

If he died first and was buried in Ashtabula perhaps she had relates in Washington co.?

--justa thought, Sue, researching
1897 Rosa May VanValkenburg marries Wm Baldwin Osborn

1900 Census Litchfield, Litchfield, CT
Osborn, William B 57 CT CT CT Farmer
--Rose M 29 wife b May 1871 married 2 yrs b MA Ohio[SIC NY] MA
--John Howard 10/12 son
Waldron, Weston 9 boarder