Page 1102 - Compton Nic "A Knot a Day"
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Thief knot
The two knots shown below might look identical
but they are tied completely differently. One is a
reef knot, used to reef sails, and the other is a thief
knot, used to tie a ditty bag so sailors could spot if
anyone had tampered with their possessions.
1 Put a bight in one end of the line, and pass the other end through the
bight.

