29th May 1776
Sir
His Majesty's Post Master General having appointed Captn John Mitchell to command the Duke of Cumberland Packet Boat employed in the Service of that Office between Falmouth and North America, and having desired My Lords Commrs of the Admty to give orders to all Commanders of His Majesty's Fleets and Ships of War to give upon all occasions the Best assistance they can to the Commander of the said Packet Boat, to avoid detaining her and stopping her upon any account; I am commanded by their Lordships to signify their direction to you not to stop or detain the said Vessel on any Account whatever, but to give her Captain all the Assistance in your Power; And in Case His Majesty's Service shou'd absolutely require contrary proceedings; It is their Lordships direction that you acquaint them with the Reasons of it that they may judge how far your Conduct is justifiable, I am &c
P.S
1. PRO, Admiralty 2/552, 95-96.