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"Diamond Knot -- The rope must be unlaid as far as the centre if the knot is required there, and the strands handled with great care to keep the lay in them. Three bights are turned up as in [the illustration], and the end of a is taken over b and up the bight of c. The end of b is taken over c and up through a. The end c is taken over a and through b. When hauled taut the strands are laid up again it will appear as in [the right illustration]." -Britannica, 1910

Diamond Knot

"Diamond Knot -- The rope must be unlaid as far as the centre if the knot is required there, and the…