Some of his men were detained in Boston, and two ships which had traded with Peterson were impounded, one of which had helped guide a prize ship of Peterson's into Martha's Vineyard.[4] Avoiding the warship HMS Rose which had been sent to chase him, Peterson headed north toward Newfoundland where he burned the prize ship and took its crew aboard.[5] He took several ships in the vicinity and held the Governor aboard his ship for a time after capturing and sacking the fort at Chebucto.[6] At the Governor's request they left the fort's defenders enough arms and cannon to repulse Indian attacks.[5]