1. Sloane MS 2558 Reference (shelfmark): Sloane MS 2558 Title: Scope & Content: George Starkey, alias Eirenæus Philalethes: Marrow of alchemy, by Eirenæus Philoponos Philalethes: 1654. Owners of Manuscripts: Guide, Family of. Collection Area: Western Manuscripts Languages: English Date Range: 1654 Extent: 1 item