Four Treasures Reference Database
Record No. 17079
Calendar of the Patent Rolls preserved in the Public Record Office: Henry III 1266–1272
Edited Book
Lyte, H.C.M., editor (1913) Calendar of the Patent Rolls preserved in the Public Record Office: Henry III 1266–1272.. London, H.M. Stationery Office, 6 Vols., Vol. 6 , 42 pp..
RWHL
gems, history of gemology, gem prices
