Trade card / calling card of infamous hangman William Marwood c1870s

Marwood, William (1820–1883). Printed calling card / trade card, stamped “Wm Marwood, Executioner, Church Lane, Horncastle, Lincolnshire, England”.
[England], c. 1870s.
 
Oblong card, 100 × 60 mm. Thick white card stock, printed on one side only with Marwood’s oval trade stamp; reverse blank. Light overall toning and surface soiling; faint handling marks and slight edge wear consistent with use, but very good.
 
William Marwood served as Britain’s principal executioner from 1872 until his death and is associated with the introduction of the “long drop” method of hanging, an instant breaker, deemed more humane than than the convicted soul dangling around in strangulation in the short drop alternative. He became so well known in Victorian Britain that a rhyme was composed in his honour: 
 
"If Pa killed ma, 
who killed Pa? 
Marwood". 
 
Surviving occupational ephemera relating to Marwood is scarce.