In the 1870 US Federal Census, George Nicholson & Eliza Nicholson are recorded on the same page as John H Capels.
Sources
US Federal Census 1860
www.familysearch.org/ark:/61903/1:1:M693-5JG
US Federal Census 1870
www.familysearch.org/ark:/61903/3:1:S3HY-6F7S-937?i=53&cc=1438024
Memorial John H Capels 1872
www.findagrave.com/memorial/53441054
Ann Arundell County is also given as Anne Arundel County