At some point farthings ceased to be valid currency—after a certain date the government would no longer honor them as money. I saw a cartoon of a Scotsman with a huge bag over his shoulder, obviously filled with farthings, rushing to cash them in before the deadline.
There was the Half Pence, 1/2 of a Pence.
And don’t forget the Farthing, 1/4 of a Pence.
Damn how did they keep it all straight?