Page 27 - Derek E. Avery - The new encyclopedia of knots

Form a bight and use this doubled rope to follow the instructions for a

bowline (see page 21) up to figure 14.1. Now instead of taking the end of
the bight around the standing part, pull enough of the bight through the
top bight (figure 15.1), separate it so that you can pull it down over the
two lower bights (figure 15.2) then take it up to the back of the knot to a
position around the standing parts (figure 15.3) and pull it tight. You now
have a strong loop in the middle of a line, although its ends were not
available to you.

figure 15.2

figure 15.3

Bowline bend: a simple yet secure way of joining any two lines together,