SQUARE KNOT • FREE TRANSLATOR.ORG • Definition of Square knot

... naturally looks for points of striking resemblance or striking difference. Where all is unknown, even the smallest sign is examined, in the hope that it may prove a clue. The Plate I, Fig. 49, has a twisted knot (the "square knot" of sailors) of cords over its head, and above this is a chiffre composed of ellipses, and above this again a sign like a sea-shell. A natural suggestion was that these might be the signs for the name of the personage depicted in Plate I. If this is so ...

— Studies in Central American Picture-Writing • Edward S. Holden