E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Six-and-Eightpence
used to be called a noble (q.v.), the third of a pound. The half-noble was often called ten groats, and was in Shakespeares time the usual lawyers fee.
1
As fit as ten groats is for the hand of an attorney.Shakespeare: Alls Well that Ends Well, ii. 2.