The letter told William that if he were to land in England with a small army, they would rise up and support him. The Invitation shortly told him about their complaints against King James. They said that the King's son was not really the King's son and that the English people generally believed him to be false. They complained that William had sent a letter to James congratulating him on the birth of his son. It was carried to William in The Hague by Rear Admiral Arthur Herbert (the later Lord Torrington) disguised as a common sailor. It was read by a secret code.