William Marwood (1818-1883), British hangman who developed and introduced the long drop

William Marwood (1818-1883), British hangman who developed and introduced the "long drop" technique of hanging. A scarce or even unique example of Marwood's business card, 'W. Marwood. Public Executioner. 4, Scotland Yard, London. Orders executed with dispatch by the Long Drop.' Together with Twenty-Five Years of Detective Life, by Jerome Caminada, in two volumes, Manchester: John Heywood & Jerome Caminada, 1895-1901, octavo, blue ribbed-cloth lettered in gilt (3)