A farthing. So called from Lord Harrington, to whom James I. granted a patent for making them of brass. Drunken Barnaby says—
Thence to Harrington be it spoken, For name-sake I gave a token To a beggar that did crave it.
Drunken Barnaby's Journal.'
“I will not bate a Harrington of the sum.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894