The line of the ball is very simple, in that is the expect path of the ball, but deflections cause complications because then the right of way changes rapidly. The better players also muddle opponents (and sometimes umpires) by appearing from nowhere to claim the line. When in the 25%, there are four possible situations that could exist. (…) The secret lies in knowing which one of the four situations you are encountering, before engaging the line or the opponent. The Field Rules in Appendix 1 of the Hurlingham Association Year Book should also be read thoroughly, so that you become fully acquainted with the way all the fouls relate to right of way and the line of the ball.