From: lancastersymphony.org Music Notation Drawing Rests (via wayback machine)
Theory Project 2: Preparing Scores
To draw the quarter rest, draw the
right side of a letter “R”, omitting
the vertical, or start with a number
“2”, but pull the horizontal line down
on the right. Put the hook on the
bottom and it’s done. The quarter rest
is a letter “R” suitable for being
placed next to a letter with a
vertical right side. It’s right out of
Gutenberg’s Bible. The hook on the
bottom is merely embellishment.
The “classical” quarter rest is a
mirror-reversed 8th rest. Don’t use
it.
Some people draw a version of the “S”
rest which was introduced in the very
early 1800’s to replace the
“classical” rest. The “S” rest is like
an S or backwards “Z” with the top and
bottom concave instead of convex or
straight. Another way to draw it is to
make a line down and curving left,
straight to the right, and then
curving left and down. That is the
easiest way to start, and I recommend
it to you. If you rotate that
clockwise you have an “S” rest. Or
copy the eighth doubled and backwards.
Or chop away half of both curves of a
Gutenberg rest.
There is a lot of variation to be
found in the quarter rest. The problem
with the Gutenberg rest is that it
takes too much vertical space and
therefore collides with other rests or
notes too often. For handwriting
music, the Gutenberg rest and the
classical rest are the worst, in my
opinion.