Birth certificate
Source: "Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:F4L9-5HF : 21 October 2020), Gladys Pearl/Pierce, 25 Jan 1899; citing Birth, Boston, Suffolk, Massachusetts, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 004275337.

Death certificate
Source: "Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:FHWR-3WL : 10 November 2020), Gladys L. Pierce, 18 May 1899; citing Death, Boston, Suffolk, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 004275461.