The following rules belong to the established Etiquette of Whist. They are not called Laws, as it is difficult, in some cases impossible, to apply any penalty to their infraction.
Any one having the lead should not draw a second card out of his hand until his partner has played to the trick, such act being a distinct intimation that the former has played a winning card.
No intimation whatever, by word or gesture, should be given by a player as to the state of his hand or of the game.
A player who desires the cards to be placed, or
who asks what the trump suit is, should do it for his own information only, and not in order to invite the attention of his partner.
No player should object to refer to a bystander, who professes himself uninterested in the game and able to decide, any disputed question of facts; as to who played any particular card, whether honours were claimed, though not scored, or vice versâ, &c. &c.
It is unfair to revoke purposely. Having made a revoke, a player is not justified in making a second in order to conceal the first.
Until the players have made such bets as they wish, bets should not be made with bystanders.
Bystanders should make no remark; neither should they, by word or gesture, give any intimation of the state of the game, nor should they walk round the table to look at the different hands.
No one should look over the hand of a player against whom he is betting.