As both a Vandercook and Francisco family researcher, I am interested in this family on account of two of their children.
Their son, Wellington J. Cilley (1846-1921) married 1. 16 December, 1874 at Dundee, Monroe Co., MI, Alice L. VANDERCOOK (circa 1857-before 1884), daughter of Robert Henry and Sarah Ann (STEWART) Vandercook. Their children were Claude L. Cilley and Alice Cilley.
Their daughter, Amy Susan Cilley (1856-after the 1920 USC), married James W. FRANCISCO 8 April, 1890 at Monroe Co., MI. Amy and James had Birdie Mae Francisco, Ina L. Francisco and Buhl Jacob Francisco.
I know how I am related to Alice Vandercook and am currently in the process of trying to find a lineage for James Francisco.