On the admirable PAS site is this seal.
It is probably late thirteenth century, and reads
*S.MARIE.DE:SAUMFORD
The PAS identifies this as Samford, Suffolk and suggests that it was from Dodnash Priory. It has the common iconography of the BVM and Babe under a trefoiled arch, with two pinnacles either side, and a suppliant underneath.
Dodnash seems to have been founded by a Wimer, chaplain of Henry II, on lands belonging to the Tosny family. It held lands locally in Bentley, Chelmondiston and Bergholt. A tiny house, it was worth £44 18s 8½d in 1525, when (consequently) it was suppressed by Cardinal Wolsey, so that he could use it in his foundation project in Ipswich.
There's a photo of the scant remains on the East Bergholt Society website.
