Mackieson gave me the other day a buffalo hide whip from Africa called in those regions a Peace Maker and used as such in the households of chieftains. Our Peace Makers are our Armstrongs and Whitworths and our engineers.

Letter to Austen Henry Layard (23 October 1864), quoted in Jasper Ridley, Lord Palmerston (London: Constable, 1970), p. 590.