Page 168 - Mario Bigon "The Morrow Guide to Knots"

BARREl KNOT

This is a well-known
knot, sometimes called
the blood knot. which is
used to join tine lines of
equal diameter, such as
gut. At first sight. it
looks complicated to
make but it is. in fact,
the opposite. It is better
to leave the knot rather
loose while you are
making it so that you do
not confuse the turns,
even though this means
that the resulting ends
will be too long and will
have to be trimmed after
the knot has been
drawn up. The grip is
excellent.