t must be executed before continuance of tour._

CASE.--A ball roquets another and on the same blow runs its bridge; the
croquet is then executed. Does the run hold good. Yes, at the player's
option. CASE.--Under the same circumstances the playing ball is taken to
the side of the roqueted ball. Can it re-roquet it on the ground that it
has run a bridge since the roquet? No. The right to re-roquet must be
acquired _after_ croqueting or moving the playing ball. But the playing
ball might have re-roqueted from its final position, declining the first
croquet.

24. _The croquet is completed when the mallet makes a perceptible blow
against the croqueting ball; but if the mallet altogether miss it, the
blow may be repeated._

The blow is perceptible if an audible sound is made, whether the
croqueted ball move or not.

CASE.--A player in croqueting claims to have hit his foot; the croqueted
ball, however, has moved from its place. Can he restore it and repeat
the blow? No. The claim should not be allowed, for it is impossible to
tell in such cases whether the ball was hit or only the foot. If it be
necessary to get the other ball out of the way, he must drive it by
concussion with his own.

25. _If the player's ball flinch in executing the croquet he forfeits
the remainder of his tour, and no point made by a flinching ball is
valid._

CASE.--A flinching ball rests under the arch of its proper bridge,
having come from the front. Is it in position? No. If the complete run
is illegal, the partial run is also, as in the case of moving a ball to
croquet.

26. _If a ball be driven out of the arena, it must be brought within it,
and placed one foot from the boundary at the nearest point._

This rule is on the supposition that the arena is of the standard
dimensions or something near it. If from the imperfections of the ground
the boundaries at any place approach too near the stakes or bridges,
this rule must be modified so that a ball shall not materially alter its
position with reference to the bridges, stakes, or other balls. Under
the same limitations it may be removed one foot from a tree or other
obstacle. The ball should be placed immediately.

CASE.--A's ball is played against a tree. If B roquet it he cannot
croquet it, or play his ball afterwards to advantage. Can he compel A to
place his ball? Yes; but not so that B's position after the roquet shall
be improved. If this were not so ruled, an obstacle would often b