Captain Jean de Lafargue lost his mind as a result of the wreck, and was replaced by his first lieutenant, second-in-command, Barthelemy Castellan du Vernet who lost his brother Leon in the shipwreck. Castellan built two camps, one for the crew and one for the slaves, a forge and an oven, and with the materials recovered from the wreckage, began construction of a boat. On 27 September 1761, a contingent of 122 French sailors (crew and officers) left Tromelin aboard the "Providence". They left the surviving slaves – 60 Malagasy men and women – on the desert island, promising to return and rescue them.