"Pennsylvania." . . . . . . . "The Wetherill papers, 1762-1899"@en . . "The Wetherill papers, 1762-1899; being the collection of business records of the store and white lead works founded by Samuel Wetherill in the late eighteenth century" . . . . . . . . . "The Wetherill papers, 1762-1899 being the collection of business records of the store and white lead works founded by Samuel Wetherill in the late eighteenth century"@en . . . . . "Wetherill & Brother." . . "Archives." . . "Archives Pennsylvania." . . "University of Pennsylvania." . .