The waters of the moat were once supplied from Gur Beck which now has been re-directed and runs approximately 50 meters adjacent to the remains of the castle.

Large timbers, presumed to be what remained of a drawbridge, an entrance to a passage, and the keel of a boat were discovered when the surrounding moat was cleaned out in 1846.

[2] In 1427 the castle and manor of Gresham was purchased by the lawyer William Paston to add to his already large property holdings in Norfolk.

Paston purchased the castle and manor from Thomas Chaucer of Ewelme and Sir William Moleyns, who each owned half of the property.

On 28 January,[3] Moleyns with a force of a one thousand men made up of some locals and retainers from Wiltshire, occupied the castle once more this time forcible evicting John Paston's wife Margaret and twelve of her servants.

In the Paston Letters Margaret explains to her husband John: ...Partridge and his fellowship arn sore afeared that ye would entren again upon them, and they have made great ordinance within the house, as it is told me.