Official website: http://www.fairmountpark.org/Solitude.asp
Site Owner(s): John Penn
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Related Sites: Fairmont
John Nancarrow, "Plan of the Seat of John Penn, jun'r: Esqr: in Blockley Township and County of Philadelphia," c. 1784.
William Russell Birch, "Solitude in Pennsyla. belonging to Mr. Penn," 1808, in William Russell Birch and Emily Cooperman, The Country Seats of the United States (2009), p. 59, pl. 9.