Flint scraper excavated by Professor Petrie at Naqada. Marked 1764. Wellcome Historical Medical Museum accession no. 17306: Five flint scrapers from Negada. Mc 1762 - 1766; Catalogue of the MacGregor Collection of Egyptian Antiquities (Sotheby’s 26 June – 3 July 1922) Lot 1133: Five flint Scrapers; ranging from 3 in to 2 1/4in long; found by Professor Petrie at Negadeh.