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WH Initials of an unidentified collector or librarian.
Borel Likely a reference to Pierre Borel (c. 1620–1671), a French physician and scholar known for his massive library and interest in rare manuscripts.
old perfect original abbreviation: "pft."
collation original abbreviation: "coll."; a term used by book collectors and librarians to indicate that the volume has been checked leaf-by-leaf to ensure it is complete and correctly ordered.