Page 139 - Peter Randall "The Craft of the Knot.."

Pass the running end around the standing part, making a loop; then,
make a bight in the running end and pass it through the crossing turn.
Pull on the standing part and the bight to tighten.
Whereas the Overhand Knot can be difficult to untie, this knot can be

untied simply by pulling on the running end to take out the last tuck,
just as you do when you untie shoelaces. However, this trick does not
work with all knots, as not all knots can be released by letting out the
last tuck.

SLIPPED NOOSE

This knot is similar to the Slipped Overhand Knot. The difference is that
the last tuck is made with a bight of the standing part, instead of the
running end.

Pass the running end around the standing part, making a loop; then,
make a bight in the standing part and pass it through the crossing turn.
Pull on the running end and on the bight loop to tighten.

It is important to learn the difference between the Slipped Overhand
Knot and the Slipped Noose. Each one will serve you as the starting
point for other knots.