A two-wheeled chaise, buggy, or noddy, drawn by two horses, one before the other: that is, AT LENGTH.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Tame * TangierNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes