Mae amgueddfa`r ddinas yn cynnal arddangosfa dros dro o emwaith brenhinol fel rhan o ŵyl gelf a chrefft The city museum is holding a temporary exhibition of royal jewellery as part of an arts and crafts festival Mae`r tlysau ar fenthyg o amgueddfa fawr yn Llundain The jewels are on loan from a large museum in London Aeth heddwas lleol i dafarn gyda rhai ffrindiau ar ôl gwaith A local policeman went to a pub with some friends after work Fe glywodd sgwrs lle roedd gang yn gwneud cynlluniau i dorri i mewn i`r amgueddfa a dwyn y casgliad gemwaith He heard a conversation where a gang was making plans to break into the museum and steal the jewellery collection Adroddodd y sgwrs i`w gydweithwyr yng ngorsaf yr heddlu He reported the conversation to his colleagues at the police station Gwnaethon nhw holi cyfarwyddwr yr amgueddfa am y system ddiogelwch They questioned the director of the museum about the security system Dywedodd fod staff ar ddyletswydd ym mhob oriel pan oedd yr amgueddfa ar agor He said that staff were on duty in every gallery when the museum was open Yn y nos, gosodwyd larymau ar bob drws a ffenestr ac roedd teledu cylch cyfyng yn gweithredu At night, alarms were fitted to all doors and windows and closed circuit television was operating Roedd yn sicr nad oedd unrhyw risg o ladrad He was sure that there was no risk of a robbery Serch hynny, roedd yr heddlu`n cymryd y bygythiad o ddifrif ac yn trefnu i swyddogion wylio`r adeilad Nevertheless, police took the threat seriously and arranged for officers to watch the building Yn ystod y nos, gwelon nhw ffigwr tywyll yn symud yn y cysgodion o gwmpas i gefn yr adeilad During the night, they saw a dark figure moving in the shadows around to the back of the building Dringodd ysgol lle`r oedd adeiladwyr yn gwneud gwaith ar y to He climbed a ladder where builders were doing work on the roof Aeth yr heddlu i mewn i`r amgueddfa a symud yn ddistaw trwy`r adeilad tywyll i`r oriel The police entered the museum and moved silently through the dark building to the gallery Yma fe ddaethon nhw o hyd i leidr yn dod i lawr o ffenestr to ar raff Here they found a robber coming down from a roof window on a rope Fe wnaethant aros iddo fynd at yr arddangosfa gemwaith, yna neidio arno They waited for him to approach the jewellery display, then jumped on him Ffoniodd yr heddlu gyfarwyddwr yr amgueddfa i ddweud wrtho am yr ymgais i ladrata The police phoned the museum director to tell him about the attempted robbery Roedd wedi synnu a dywedodd `Nid yw hynny`n bosibl - mae ein system ddiogelwch mor berffaith` He was astonished and said `That is not possible - our security system is so perfect` |