The Gamma part concerns what can logically be asserted of meanings. CSP claims that he has been unjustly called a sceptic, a second Hume. Qualities as mere possibilities. Relations are qualities of sets of subjects. Dyadic and triadic relations.
All triadic relations are, more or less, thoughts.
2nd Part of 3rd Draft of 3rd Lecture. 30-34 and 3664 respectively. Note that part of 1.349 comes from page 68 of MS 465, with p. 68 of that manuscript continuing p. 64 of this one. Beta and gamma graphs, with algebraic translations. Rules of transformation.