The trial of a cause instituted by Richard Pepper Arden, Esq; his Majesty's Attorney General, by writ of scire facias, to repeal a patent granted on the sixteenth of December 1775, to Mr. Richard Arkwright, for an invention of certain instruments and machines for preparing silk, cotton, flax, and wool for spinning; before the Honorable Francis Buller, One of the Judges of his Majesty's Court of King's Bench, At Westminster-Hall, on Saturday the 25th of June 1785.