^His surname is also spelled Flannigan and Flanigan in various vital records, but the spelling Flanagan is found in his obituary in the Wisconsin State Journal and on his gravestone (Sylvester W. Flanagan) at Calvary Cemetery in
Monroe, Wisconsin.
References
^"Wisconsin Birth Index, 1820–1907," database, FamilySearch (
https://familysearch.org/ark:/61903/1:1:VHH9-5GF : 4 December 2014), William S Flannigan, 09 Apr 1901; from "Wisconsin Births, 1820–1907," database, Ancestry (
http://www.ancestry.com : 2000); citing Green, Wisconsin, reel 0078, Wisconsin Department of Health and Family Services, Vital Records Division, Madison.