society > leisure > entertainment > pastimes > betting > [noun] > book-making > book-maker > book-maker's assistant (4)
Horse Racing slang. A bookmaker's clerk.
one who practises tick-tack telegraphy.
A clerk in a betting shop who calculates the winnings.
U.S. A person who collects money on behalf of a bookmaker, a person running a numbers game, etc. Now rare.