This strange object is an old bark mill, formerly used in connection with the tanneries which were situated on the north-east of the Tye at Alfriston.
The village tanneries were evidently working up to 1843 as in that year the property changed hands.
Most market towns had tanneries where animal skins were treated with tannin and made into leather. The leather was bought by leather dressers, saddlers, glovers and lace pattern makers to be turned into finished goods.
Lewes had at least one tannery, which apparently smelled horrible. A great deal of urine was used in the process. How it was collected,
Rouser would rather not go into.