Page 135 - Buck Tilton - Outward Bound Ropes, Knots, and Hitches 2 ed.

Bring the second working end around the back of
the standing part of the first line, then over the

first working end. Then bring it behind the first
loop but over its own standing part where it
crosses under the first loop, as shown in the

photograph.

Carrick Bend: Step 4