How to tie a Buntline Hitch
Take the end (working end) of the rope and pass it up through the ring from back to front.
Take the end of the rope behind the long standing part (this forms a half hitch). The bring it across the front of the half-hitch.
Now double back on yourself and take the working end of the rope behind the half-hitch.
Bring the end of the rope around to the front of the knot and pass it through the half-hitch
To tighten the knot pull on the long standing part (the bit we didn't use) and the working end (the short bit that did all the running about).
Pass it all the way through and then pull on the standing part to secure the knot.