 Erskine returned to London where Cromwell's servant John Gostwyk gave him a gift of silver plate, £20 to his companion the Lyon King of Arms, David Lyndsay, and 80 crowns to the Rothesay Herald.John Erskine was also a commissioner for the marriage negotiations of James V and Mary of Bourbon.After James married Madeleine of Valois, Mar took receipt of Dunbar Castle, which was formerly garrisoned by John Stewart, Duke of Albany for France.