Kath Morris and Gwenfron Picken only found out recently that they had both worked at the secretive intelligence facility, Bletchley Park.
Dim ond yn ddiweddar y gwnaeth Kath Morris a Gwenfron Picken ddarganfod bod y ddwy ohonynt wedi gweithio yn y cyfleuster cuddwybodaeth cyfrinachol, Parc Bletchley.