[Illustration: Fig. 5.]
This is a guard for the left arm, to prevent its being abraded by the
string when loosed; it also has another object, viz., to confine the
sleeve and keep it out of the way. It consists of an oblong piece of
smooth leather, and is fastened to the arm by straps. In fitting it
on, care should be taken that the ends of the straps are not left
loose, and that the buckles come well round to the back of the arm, so
as not to be in the way of the string; for if there be the least
projection on which it can catch, your best aim will be of no effect.