The late discovery of a Vessel under the ancient bed of the river Rother having given rise to various conjectures and contradictory statements, respecting her age and former service, and the subject being of some interest in naval architecture, I was directed by Sir Byam Martin, at the request of Lord Melville, to repair to the place where she was found, and to obtain a true account of her build and situation; in order, if possible, to ascertain the country she belonged to, and the period of her submersion. My Report has been subsequently transmitted to the Admiralty; and, at the suggestion of Mr. Barrow, I have taken the liberty of addressing to you a Letter, containing the substance of that Report; and should the subject be compatible with the regulations as to Papers usually read at the Society of Antiquaries, it will afford me much satisfaction if you will do me the favour to introduce it at the ensuing meeting.