The Probert Encyclopaedia of Recreation

ALL FOURS

All fours is a game at cards, which derives its name from the four chances of which it consists, for each of which a point is scored. These chances are high, or the ace of trumps, or next best trump out; low, or the deuce of trumps, or next lowest trump out; jack, or the knave of trumps; game, the majority of pips collected from the tricks taken by the respective players. The player who has all these is said to have all-fours. It is played by two or four persons with the full pack. The ace counts four, the king three, queen two, knave one, ten ten.
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