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Herbert T. Pratt Papers, 1793-2013 (inclusive) 1945-2000 (bulk)
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Moore Archives at Historic Yellow Springs [Contact Us]
Held at: Margaret R. Grundy Memorial Library [Contact Us]
Held at: Newtown Historic Association [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quakertown Historical Society [Contact Us]
Held at: Southampton Baptist Corporation [Contact Us]
Held at: Solebury Township Historical Society [Contact Us]
Held at: Upper Darby Historical Society [Contact Us]
Held at: Westtown School Archives [Contact Us]
Held at: Historic Langhorne Association [Contact Us]
Held at: Historical Society of Hilltown Township [Contact Us]
Held at: Roxborough Manayunk Wissahickon Historical Society [Contact Us]
Held at: St. James' Community History Center [Contact Us]
Held at: Historical Society of the Eastern Pennsylvania Conference of the United Methodist Church [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: John Bowman Bartram Special Collections Library [Contact Us]
Held at: Downingtown Area Historical Society [Contact Us]
Held at: Darby Free Library [Contact Us]
Held at: King of Prussia Historical Society [Contact Us]
Held at: Lansdale Historical Society [Contact Us]
Held at: Limerick Township Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Pottstown Historical Society [Contact Us]
Held at: Historical Society of the Eastern Pennsylvania Conference of the United Methodist Church [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: Bridesburg Historical Society [Contact Us]
Held at: Lansdale Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Plymouth Meeting Historical Society [Contact Us]
Held at: St. James' Community History Center [Contact Us]
Held at: Springfield Township Historical Society (Montgomery County, Pa.) [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Awbury Arboretum [Contact Us]
Held at: Chestnut Hill Historical Society [Contact Us]
Held at: Mikveh Israel Archives [Contact Us]
Held at: Princeton University Library: Latin American Ephemera [Contact Us]
Held at: Chestnut Hill Historical Society [Contact Us]
Held at: Friends of Northeast Philadelphia History [Contact Us]
Held at: Wissahickon Valley Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]