With the success of the Panama isthmus raid, in 1577 Elizabeth I of England sent Drake to start an expedition against the Spanish along the Pacific coast of the Americas. Drake used the plans that Sir Richard Grenville had received the patent for in 1574 from Elizabeth, which was rescinded a year later after protests from Philip of Spain. Diego was once again employed under Drake; his fluency in Spanish and English would make him a useful interpreter when Spaniards or Spanish-speaking Portuguese were captured. He was employed as Drake's servant and was paid wages, just like the rest of the crew. Drake and the fleet set out from Plymouth on 15 November 1577, but bad weather threatened him and his fleet. They were forced to take refuge in Falmouth, Cornwall, from where they returned to Plymouth for repair.