This MP remains an elusive figure, although he was almost certainly a Sussex man, and to judge from his activities as a feoffee he probably received some training in the law. Early in 1441, together with the Mille brothers, Edmund* and Edward*, both of whom were lawyers, he was enfeoffed of certain lands in Middlesex belonging to the Sussex esquire John Weston II*;
Several years later, in 1472, Berwick defended himself in Chancery in a suit brought by John Gunter regarding land in Sussex which Gunter claimed had been sold to him by Edmund Mille’s widow. One of the trustees of this property, he had allegedly refused to transfer possession to the petitioner on the basis that the purpose of the enfeoffment, made at least 20 years earlier, had been to create an entail in favour of the heirs of Maurice Pomeroy.
