irst half-round, and from the other
side for the second half-round._

9. _A bridge is not run unless the ball pass completely through it._

To decide this in a doubtful case, place the mallet handle against the
piers in front; if any part of the ball project beyond the plane of the
bridge it will become evident. The ball is then said to rest under the
arch of the bridge.

10. _A ball resting under the arch of a bridge and having come from the
front makes no point, but is in position to run the bridge._

The run may now be completed by concussion, or, if the ball remain till
next tour, by a blow of the mallet.

11. _A ball resting under the arch of a bridge, and having come from the
reverse side, is not in position to run it._

To decide a doubtful case, place the mallet handle against the piers on
the reverse side.

CASE.--A ball was in position under the arch of a bridge but is driven
back, and afterwards gains the same position from the reverse side. Is
it in position, since it once reached that point from the front? No. The
run of the bridge must be continuous, though not necessarily at one
blow.

12. _If a ball pass completely through a bridge and rebound or roll
back, the run remains good._

13. _If a ball pass completely through a bridge in the reverse
direction, and rebound or roll back under the arch, it is in position._

14. _If a bridge be oblique any player may adjust it, unless a ball be
under the arch._

That is, it must first be decided whether the ball has run the bridge or
is in position.

15. _The stake may be tolled from any direction and by the slightest
perceptible touch._

An audible sound will be evidence of the tolling; but when it is so near
that the sound cannot be distinguished from that of the mallet, it must
be seen to change its direction.

16. _A ball roquets another when it comes in contact with it from a blow
of the mallet; provided both balls are bridged at the time of contact,
and the playing ball has not roqueted the other ball before during the
same tour since making a step on the round._

CASE.--A booby hits a booby and both pass through the first bridge; can
it croquet? No. It is not a roquet unless they remain in contact after
passing through the bridge. It must roquet again.

17. _A ball already in contact with another ball does not roquet unless
it move it perceptibly._

To do this it must, of course, play in a direction less than ninety
degrees from a line