HMS Defiance was a 64-gun third rate ship of the line of the English Royal Navy, ordered on 26 October 1664 under the new construction programme of that year, and launched on 27 March 1666 at William Castle's private shipyard at Deptford in the presence of King Charles II.[citation needed] Samual Pepys was a member of the Court Martial of the ship's gunner who was accused of causing the loss of the ship. In Pepys' diary entry for 25 March 1669, he writes that the ship was lost due to the "neglect" of the gunner "in trusting a girl to carry fire into his cabin".