After these two failed expeditions, the Duke turned to his own people. Captain Otto Stiel, a Courlander who had previously visited the Gambia, was appointed as its Governor and as Commandant of St Andrew's Island. In 1658, the Duke of Courland and his family were captured by a Swedish mercenary after becoming embroiled in the “Deluge”, and communication between Courland and St Andrew's Island was cut off for around two years. As a result of this, the Dutch West India Company made an agreement with the Duke's representative in Holland, Henry Momber, by which they would resupply St Andrew's Island but as a result be allowed to take it over. Momber agreed, in the absence of any instructions from the Duke. The Dutch sent a ship of soldiers to the island to seize it. Stiel objected, but on learning that the Dutch West India Company would guarantee them their pay, the garrison mutinied and returned to Holland on the ship that had brought out the new garrison.