from The Century Dictionary.
- noun A mnemonic device consisting of strings in which a number of knots are made, the number and order of knots serving the end of recalling certain objects or events: used by many primitive tribes unfamiliar with the art of writing—for instance, by the Australians, the California Indians, and also by the Peruvians. See
Sorry, no etymologies found.
Now, being always desirous of knowledge, I had caused myself to be instructed in the plan of this knot-writing which by this time I could read well enough.