John Purdy's "Memoir" was long accepted for dating the first landing on Rockall as being on this voyage, on 8 July 1810. However, examining "Endymion"s own logs at the Public Record Office, James Fisher (of the 1955 Rockall landing) discovered that the first landing date was actually Sunday 8 September 1811. Captain Sir William Bolton took command sometime in 1810 through to 9 March 1812. One of her lieutenants during the 1810 voyage was one Basil Hall, who was still with the ship when the 1811 landing was made.