The totality of all the lines of identity that join one another is termed a ligature. A ligature is not generally a graph, since it may be part in one area...
A collection composed of any line of identity together with all others that are connected with it directly or through still others is termed a ligature....
Robin Catalogue:
A. MS., notebook, n.p., 1903, pp. 1-31.
The first and third parts of an introduction to the alpha and beta parts of the system of existential graphs; MS. 456 is...
From the Robin Catalogue:
A. MS., G-1905-1e, pp. 1-65; 33-40; 38-41; 37-38; 40-43.7; plus 64 pp. of fragments running brokenly from p. 1 to p. 60.
This was to have...