Peter’s father, William Dickwood, probably arrived in Fowey as a child during the 1540s, ‘driven thither from Antwerp for religion’. He and his brother Thomas established themselves as merchants, and changed their surname to Peter, perhaps because of some relationship with the prominent Petre family of Fowey.
The Peter and Treffry families controlled between them one-fifth of the burgess votes in Fowey, and their alliance probably helped to secure Peter’s election to Parliament in 1604.
By 1611 Peter was engaging in coastal trade as well as international commerce, bringing in wheat from Truro, Cornwall.
