This reference is in her profile:
Birth Date: 1750 Birthplace: Pennsylvania Volume: 39 Page Number: 450 Reference: Ten "Series" of "Pennsylvnia Archives" have been so far published in from 5 to 31v. Ea. Philadelphia and Harrisburg. 1852- ( We have indexed Series 2, v.2 and v.8 ( early Pa. marriage recds.) And all the v. of SeriesV. Which contain nearly complete Pa. Rev. War recds.)s.2, v.2:65 Original data: Godfrey Memorial Library. American Genealogical-Biographical Index. Middletown, CT, USA: Godfrey Memorial Library.
There is a 10 year old Mary Daniel in the 1860 Census, she was born in PA her mother born in England.
"United States Census, 1860," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:MXTM-6N9 : accessed 7 December 2015), Mary Daniel in household of Ann K Daniel, Norwegian Township, Schuylkill, Pennsylvania, United States; from "1860 U.S. Federal Census - Population," database, Fold3.com (http://www.fold3.com : n.d.); citing p. 130, household ID 937, NARA microfilm publication M653 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 805,179.