It is clear from the record of his litigation in the court of common pleas that Jacob was engaged in trade in west Sussex by 1442. Among the pleas he brought in the 1440s were suits against two notaries of Thorney for a debt of £7 16s. 8d., a butcher from Arundel for £3, and the widow of William Warnecamp* of Arundel for £17.
Jacob’s standing in Chichester was undoubtedly enhanced by his second marriage, to Joan, the widow of a former mayor of the staple, John Fust, who had died in 1451. The match had taken place by the autumn of 1455, when he and Joan recovered a debt of £17 owed to her former husband by a local merchant, and in the same law term they were also suing other of Fust’s debtors from elsewhere in Sussex.
In the meantime, as mayor of the city Jacob had presided over the Chichester elections to Parliament on 16 Nov. 1459, and a year later, still officiating as mayor, he witnessed the indenture for the shire election held in the county court at Chichester on 28 Aug. 1460, before returning himself as MP for the city by an indenture dated 22 Sept. He did, however, relinquish office before the Parliament met on 7 Oct.
As mayor of the staple of Chichester Jacob could opportunistically further his own interests. In his staple court in February 1472 a Salisbury woolmonger, Thomas Lambevale, undertook to pay him £20 for a consignment of wool. When he failed to pay on the due date the mayor procured a writ to the sheriff of Wiltshire, which eventually resulted in Lambevale’s imprisonment at Salisbury in April 1475, although as he was found to have no lands or chattels which might be confiscated his creditor may have remained unsatisfied.
