Make your Q in its square in the self-same manner as was prescribed for
O; but add to it its tail thus: Draw a diameter of the square, the line
a. d., about which, starting from the curved outline, begin to draw a
long tail, producing it through the angle d. in such fashion that d. may
be in the middle of the thickest part of the tail; but where the tail
begins let it be a little narrower than in the angle d., where it should
attain its real thickness. Then let it be drawn out, beyond the angle d.
to the length of the entire diameter, and in a downward direction, yet
so that it curves while it slopes, & that its tip shall not fall lower
than a third of the side below the lowest side of the square, and shall
tend, as it nears the point, to grow sharper little by little, and at
length end in a very fine point indeed.
Or you shall give Q a shorter tail in this fashion, to wit: set your
compasses to the length of the side c. d. and draw a tail from the bulge
of the same letter, describing through the point d. its inner arc of the
same length as c. d., taking care that the tail bend upwards until it
again reach c. d. produced, in the point h.; then shift your compasses,
& with the other leg again describe from the bulge of the letter an arc
below d. & continue it until again it reach h., but in such fashion that
the tail shall find its greatest thickness at the start, as in the
following figure is doubly depicted.
[Illustration: Q]