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A pawnbroker. Pontius Pilate’s guards, the first regiment of foot, or Royal Scots: so intitled from their supposed great antiquity. Pontius Pilate’s counsellor; one who like him can say, Non invenio causam, I can find no cause. Also (Cambridge) a Mr. Shepherd of Trinity College; who disputing with a brother parson on the comparative rapidity with which they read the liturgy, offered to give him as far as Pontius Pilate in the Belief.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Poney * PopeNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes
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Francis Grose was independently wealthy, having inherited money from his father, a jeweller. Finding himself overspending, he published a number of books; his Provincial Glossary seems to have been the starting-point for the Vulgar Tongue reproduced here.