17 Pg. 17, Trench IX, 2/8/1971, NB521 B296, Trench IX, MF 1971 97 [no page number], 2/8/1971, Lot 6905 Pg. 17, Trench IX, 2/8/1971, NB521 B296, Trench IX, Lot 6905 ... 2/8/1971
A small piece of poros which has been trummed to a trapezoidal shape. The upper surface (not parallel to the lower) has been deeply gouged by incisions which might represent mason's marks, frequently used ... 1971/08/02
