15. If the striker play with a wrong ball, he loses the lead.
16. If the ball should be changed in a hazard or game, and not known by which party, the hazard must be played out by each with their different balls, and then changed.
17. If the striker play with his adversary's ball, and should hole, or force the ball he played at over the table, it is deemed a foul stroke.
18. If the striker play with his adversary's ball, and miss, he loses one point, and if his adversary discover that he hath played with the wrong ball, he may part the balls and take the lead.
19. In all the before-mentioned cases with the wrong ball, if the error be not discovered, the adversary must play with the ball the striker played at throughout the hazard, or part the balls and take the lead.
20. Whoever proposes to part the balls, and his adversary agrees to it, the proposer loses the lead.
21. Two missings do not constitute a hazard, unless previously agreed on to do so.
22. When four people play, each party may consult with, and direct his partner in any thing respecting the game, &c. ; and the party who misses twice before a hazard is made, is out, and it is his partner's turn to play; and though his adversary should hole a ball, so as to make a hazard at the stroke following the two missings, yet the party who did not make the two missings is to play, as he cannot be supposed to be out who has not made a stroke.