Which one is correct?
http://i53.tinypic.com/2hdvdps.jpg
http://www.layhands.com/Knots/Knots_Hitches.htm#TumbleHitch
If you happened to do some testing with different lines on different objects, you’d quickly realize that there is something very wrong with the hitch presented by layhands. It looks like Mr. Root was a bit too hasty attempting to rehash the presentation.
The name “tumble hitch” was given by Roo to one of a couple/few
“slip-free” hitches I discovered; this is shown on his site. That shown
by Layhands is a curious different tying of the hitch that was presented
in Outdoor Knots (called “slip-free hitch” ) --where the slip-tuck runs
directly out through the nip-bight, not past it then back through,
as Layhands shows. (Although it should be noted that the finished
knot looks correct for this other hitch, but for the nip-bight’s tilt.)
The one I just sketched --i.e., the directly tucked one; taking the
Layhands Step-3 tail and making slip-bight to run straight up
through the nip-bight-- is briefer in material than the tumble hitch.
The latter (like-Layhands) is a simple revision to the treacherous
but broadly published highwayman’s hitch(which comes with
an equally dubious history of purpose): one just changes which
of the trio of formed bights goes through or around which other
–nip-bight, frame, & slip-tuck (toggle).
The highwayman’s hitch heavily loads the nip-bight, pulling the
slip-tuck hard into the frame, which can lead --especially on relatively
larger-diameter objects-- to the slip-tuck being capsized through the
frame bight. It otherwise still puts load on something one hopes to
later pull free. In contrast, the Layhands hitch loads the “frame”-bight
and has a passive nip-bight which the frame pulls into to effect the nip.
An advantage in some situations (around a large & rough/frictive
object), the like-Layhands variant consumes less cordage and
doesn’t run the release line around the object. But the tumble
hitch can achieve such efficiency, nearly, by running the S.Part’s
“frame” bight all the way around the object, thus letting the
finish be brief and not around the object, BUT THEN BY adding
a 2nd slip-tuck through the first (which otherwise would pull
out, as insufficient nip is generated vs. the pulling of frame
on slip. And some other variations of these slip-free hitches
can benefit from a 2nd slip-tuck as well.