The Commens Dictionary
Quote from ‘Graphs, Little Account [R]’
A rhema which is made a part of a graph and is not itself compounded according to the rules of existential graphs is called a spot and the places where proper names might be inserted are called the hooks of the spot.
MS [R] S27:21
‘Hook’ (pub. 18.03.18-13:22). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-graphs-little-account-r-6.