Alice Mills Barbados

``In 1693 the council of Barbados, paid one Alice Mills, ten Guineas for castrating 42 rebellious African slaves . The ghoulish rationality of this exercise in pre-decimal currency, was 2 shillings, sixpence per testicle''

Shilling about 5 pennies was a days wages.

From ``if the Irish ran the world''

http://www.amazon.co.uk/Irish-Ran-World-Montserrat-1630-1730/dp/0853239622