Thief Knot
The story goes that this was originally used to catch a thief. If a sailor suspected someone to be going through his bag, he could tie this Reef Knot look-alike, and if he found the bag secured with a regular Reef Knot, he’d know that someone had been snooping.
The difference between the reef knot and the thief knot is simply that the working end of each rope comes out on opposite sides of the knot.
