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Albert Cook Myers Historical Collection: William Penn papers, 1645-1960 (inclusive)

Held at: Chester County Historical Society [Contact Us]

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Buffington–Marshall papers, 1707-1876 (inclusive)

Held at: Chester County Historical Society [Contact Us]

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Colonel Richard Thomas papers, 1741-1919 (inclusive)

Held at: Chester County Historical Society [Contact Us]

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Taylor, Harris, Roman, Frazer, and Smith families papers, 1683-1980 (inclusive)

Held at: Chester County Historical Society [Contact Us]

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Wagner Free Institute of Science Director's files and business records, 1885-1924 (bulk) 1858-1938 (inclusive)

Held at: Wagner Free Institute of Science [Contact Us]

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Robert Chambers collection on William Wagner and the history of the Wagner Free Institute of Science, 1820-1910 (bulk) 1798-1980 (inclusive)

Held at: Wagner Free Institute of Science [Contact Us]

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Wagner Free Institute of Science Actuary and Librarian records, 1883-1901 (inclusive)

Held at: Wagner Free Institute of Science [Contact Us]

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Zaccheus Collins correspondence, 1805-1827 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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Edward Drinker Cope papers, 1859-1907 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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Academy of Natural Sciences, Philadelphia Exhibits Department records, 1852-2001 (inclusive)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]