the ball in the hands of a Fielder, unless some part of his person is
touching a base he is entitled to occupy: _Provided_, the ball be held
by the Fielder after touching him; but (exception as to First Base), in
running to First Base he may overrun said base, without being put out
for being off said base, after first touching it, provided he returns at
once and retouches the base, after which he may be put out as at any
other base. If, in overrunning First Base, he also attempts to run to
Second Base, or, after passing the base he turns to his left from the
foul line, he shall forfeit such exemption from being put out.