"Pennsylvania, Philadelphia City Death Certificates, 1803-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JDP8-NMS : 18 February 2021), Simon Seyfert in entry for Mary Jane We..., 14 Apr 1907; citing cn 10883, Philadelphia City Archives and Historical Society of Pennsylvania, Philadelphia; FHL microfilm 1,402,879.
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