Eighteenth century documents relating to the land covered by 3 and 5 Castle Street reveal how the rear boundary was made up of the wall of the Castle Salthouse. Today this boundary can be found just off of Bond Street, where can be found an old stone lias wall. This wall has clearly been patched up at various points in its existence, which makes it difficult to determine whether this is a medieval feature associated with the original castle, or a post medieval feature relating to Harvey’s rebuilt manor house. In either case the Salthouse would have been vitally important to life of the castle. This was where meat and other foodstuffs were cured for preservation, in the days before refrigeration.
Although the building itself has been demolished and only part of one wall remains, we can make out the ghost of the structure from the bordering brickwork. Where the construction of that wall is much looser and untidy is where the builders of the new house were pressing up against the gable end of the Salthouse. [1]
[1] I am indebted to John Allen for sharing his research and transcriptions of the original documents.