E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
I am off to Bedfordshire. To the land of Nod, to bed. The language abounds with these puns, e.g. the marrowbone stage, A Dunse scholar, Knight of the beer-barrel, Admiral of the blue, Master of the Mint (q.v.), Master of the Rolls (q.v.), etc. And the French even more than the English.