New History Hoydens post up! Part 1 of 2, excerpts from James Hardy Vaux’s 1819 Dictionary of the Flash Language (i.e. criminal slang).
BEST: to get your money at the best, signifies to live by dishonest or fraudulent practices, without labour or industry, according to the general acceptation of the latter word; but, certainly, no persons have more occasion to be industrious, and in a state of perpetual action than cross-coves [criminals, as opposed to square-coves, honest men]; and experience has proved, when too late, to many of them, that honesty is the best policy; and consequently, that the above phrase is by no means à-propos.