Swyddfa’r Post ( rough pronunciation sooeethva post ) is the Welsh for Post Office.
The Post Office is to be found at Castle Square, Caernarfon, Gwynedd LL552ND
There is a commemorative plaque in Caernarfon Post Office to Sir William Henry Prys of Bryn Helen.
He was the head of the Caernarfon Post Office and invited Marconi, he of television invention fame, to North Wales and donated £600 to his research into wireless transmissions. More details ..