right-hand adversary should put on the nine, or any lower card; in this case win it with the ace, and by playing the small card of that suit, return the lead upon the adversary, who will have reason to judge that the king lies behind him, and consequently will not play his queen if he should have it; by this method you have a fair probability of winning a trick, and at the same time of letting your partner into the state of your game.
17. If your partner force you to trump a card early in the deal, you are to suppose him strong in trumps, except at the points of 4 to 9 ; and, therefore, if you are strong in trumps, play them.
18. Suppose you call at the point of 8, and your partner has no honour : and you should have the king, queen, and ten; the king, knave, and ten; or the queen, knave, and ten of trumps ; when trumps are played, always put on the ten, which demonstrates to your partner that you have two honours remaining.
19. Suppose your right-hand adversary calls at the point of 8, and his partner has no honour; and you should have the king, nine, and one small trump, or the queen, nine, and two small trumps; when trumps are led by your partner, put on the nine, because it is about 2 to 1 that the ten is not behind you.
20. If you lead a suit, of which you have the ace, king, and two or three more, when you play the ace, if your partner play the ten or knave, and you should have one single card of any other suit, and two or three small trumps only : in this case lead the single card, to establish a saw; for your partner has an equal chance to have a better card in that suit, than the last player ; whereas, had he led that to you, which probably was his