Tom Bredehoft, Pettibone Registry, page 542, see K. Pontius Click the Changes tab for the details of edits by Tom and others. [2]
"Illinois, Cook County, Birth Certificates, 1871-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQTF-THQ : 18 May 2016), Albert Henry Bradish in entry for Albert Pettibone Bradish, 20 Aug 1881; citing Chicago, Cook, Illinois, United States, reference/certificate 10100, Cook County Courthouse, Chicago; FHL microfilm 1,287,816.