Alert was wrecked in 1791 .
Hughes then sent Diligent and Chatham to New York in alternate months to get the mail and dispatches , which were being routed through there and otherwise might sit there for several months .
Alert was wrecked in 1791 , but Hughes then sent Diligent and Chatham to New York in alternate months to get the mail and dispatches , which were being routed through there and otherwise might sit there for several months .