i too remember farthings from a childhood trip to Dublin.. back then the irish pound was tied to the value of the english pound, and it was $5.70 US to £1 Sterling.. and a farthing was worth almost 2 US cents! Farthings and Ha'pennies went far in a candy store! thru'pence was a fortune!
(mind you i was also mesmerized by a woman on a bus, she had some souvenier jewelry made from US Mercury dimes.. and i sat staring at them.. she started to explain to me that it was American money, and i repied, yes, i knew, she was wearing over $1.70 as jewelry! how rich i thought, she must be to be able to wear money!)