The chronology of Roman engraved gemstones - WOLF-RÜDIGER MEGOW , KAMEEN VON AUGUSTUS BIS ALEXANDER SEVERUS (Deutches Archäologisches Institut, Antike Münzen und Geschnittene Steine, Band XI, Walter de Gruyter & Co. Berlin 1987). Pp. xvii + 326, pls. 51. 228 DM. ISBN 3-11-010703-1. - MARIANNE MAASKANT-KLEIBRINK , DESCRIPTION OF THE COLLECTIONS IN THE RIJKSMUSEUM G. M. KAM AT NIJMEGEN. X. THE ENGRAVED GEMS. ROMAN AND NON-ROMAN, (Ministry of Welfare, Health and Cultural Affairs, Nijmegen 1986). Pp. xx + 124, 9 figs. in introduction, numerous photographs in catalogue. FI. 180 (cloth). ISBN 90-71923-01-0. - J. David Zienkiewicz , “The engraved gemstones,” in ZIENKIEWICZ, THE LEGIONARY FORTRESS BATHS AT CAERLEON II. THE FINDS (National Museum of Wales and CADW: Welsh Historic Monuments, Cardiff 1986). Pp. 117-41, frontispiece and pls. v-xvii (=255 pp. + 1 col pl. and 13 b&w pls.). £29 (£48 for vols. 1 and 2). ISBN 0-7200-0304-0. - J. DAVID ZIENKIEWICZ , ROMAN GEMS FROM CAERLEON, (National Museum of Wales — Roman Legionary Museum Caerleon, Cardiff 1987). Pp. 23, 10 col. + 36 b&w. illus. £1.95. ISBN 0-7200-0314-8.