what evidence is there that in the letter that the squire may be easily duped by the people he is trusting to outfit his ship? chapter 7

Trelawney's letter indicates that the ship, the Hispaniola, is ready to sail. Jim is troubled by the fact that Trelawney has let everyone in Bristol find out about their treasure hunt. Trelwaney writes that he has purchased a ship. As a ship's cook, the squire has engaged a one-legged old sailor named Long John Silver, who, in turn, found a crew of very tough sailors.