1880 Census: Lists Sarah Wilcox, age 75, as a boarder with Emma, John and Harry La Tour in Philadelphia.
Death Certificate lists Sarah Wilcox as 86 years (1892), a widow, born in Del. Co. Pa. There is no online listing for "Roxborough" as her burial place, at least at the current time.
These two documents seem to fit together as the same person. I am thinking this is Sarah Ellis Willcox, wife of John H. Willcox. The Ellis family was from Haverford, Montomery County. I need to match the dates and see if she lived this long and outlived "John H." I still don't know what the H is for.