three mixed metal trephines with conical crown and spiral teeth, possibly American, late 19th Century, one with removable ebony handle – 12cm. (with handle), 11cm. (without handle); an English, 19th Century, stamped HILLIARD, metal and ebony handled Hey-type saw – 17cm. (length); and a 19th Century, metal and ebony handled Hey-type saw – 20cm. (length); a lenticular, 18th Century, steel and turned lignum vitae handle -- 15.5cm. (length); together with, a possibly 18th Century, metal and wood brace and bit cranial trephine (without bit) – 17cm. (length) Note: Previously bought Christie’s, South Kensington 3rd March, 1992 (Lot 83). Hillard skull saw previously bought David Stanley Auctions, 10th November 1999 (Lot 858). Second skull saw previously bought David Stanley Auctions, 29th March 1997 (Lot 459). The brace and bit cranial trephine previously bought David Stanley Auctions 30th September, 1995 (Lot 1335).