Plac ar Drig Point yn Tredunnock, ger Llanhennog, Sir Fynwy.
Mabwysiadwyd gan deulu Hollingdale ar gyfer Alan Edward Hollingdale a oedd yn Sarjant Patrol Langstone.
Mae geiriad y plac yn darllen:
ORDNANCE SURVEY TRIG PILLAR TREDUNNOCK
ADOPTED BY THE HOLLINGDALE FAMILY
OF LLANWERN. MAY 1995
AND DEDICATED IN APPRECIATION
OF THE WORK OF ALAN HOLLINGDALE AND HIS FELLOW
MEMBERS OF AUXILIARY UNITS,
THE BRITISH RESISTANCE MOVEMENT
IN THIS COUNTY.
1940 - 1944
Map reference
51.643, -2.918
OS Grid Reference
ST 36563 94227
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