E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A prison, the stocks, or any other place of confinement. (Welsh, llob, a dolt). The Irish call it Pooks or Pouks fold, and Puck is called by Shakespeare the lob of spirits, and by Milton, the lubber fiend. Our word lobby is where people are confined till admission is granted them into the audience chamber; it is also applied to that enclosed space near farmyards where cattle are confined.