On May 12, 1789, the Spanish vessel "San Carlos" arrived. With this reinforcement in place, Martínez seized "Iphigenia" and arrested the crew. This alarmed Chief Maquinna, who moved his Nuu-chah-nulth people from Friendly Cove to a village deeper into Nootka Sound. After a couple weeks Martínez, in a tricky diplomatic situation, decided to let "Iphigenia" go after Douglas agreed to certain conditions. Kendrick and Ingraham acted at witnesses to the agreements. Among the conditions Martínez required Douglas to promise to leave the Pacific Northwest and never return—a promise he broke immediately upon leaving Nootka Sound as he sailed north to cruise the coast for furs. Douglas sailed from Nootka Sound around the start of June. On June 8, 1789, the "North West America" returned. Martínez confiscated the vessel as security for payments Douglas owed for repairs and supplies given to "Iphigenia".