On leaving Wimbledon School of Art, Mary was encouraged by her former teacher, Robert Baker, to establish a pottery for the owner at Sudbury in Suffolk. Although this was a wonderful opportunity, she had always wanted to work with Bernard LEACH, but in the early 1940s the Leach Pottery did not encourage students straight from Art School, preferring instead apprentices. Mary was not discouraged; after spending three months at Lake's Pottery in Truro, she came to spend a day with Bernard and eventually started work at the Leach pottery in 1944.
She spent a year living in Pottery Cottage where she met many of Bernard Leach's friends, including Barbara HEPWORTH and Patrick HERON, before moving to accommodation on the harbour. She was trained by Margaret LEACH to pack the three-chamber climbing kiln, and learned to throw and glaze.
In 1947 she left to help start a pottery in Surrey along with Michael CARDEW, but this was not successful, and in 1949 she joined Michael at his pottery in Wenford Bridge in Cornwall. Mary now lives and works in Devon, making and selling her ceramics at the Buckfast Abbey's monastic shop.