Editorial notes

1) See facsimile; both "this" with an arrow each pointing to two-forks graphic above.

2) See facsimile; both "this" with an arrow each pointing to one-fork graphic above.

3) For estimated dating June 1-June 15 1938 see the editors' dating of Wittgenstein's "Lectures on Knowledge" nos. 9 and 10, for which Ms-159,31v-32v seems to contain preparatory notes: V. Munz and B. Ritter (eds.): Wittgenstein's Whewell's Court Lectures: Cambridge, 1938-1941. From the Notes by Yorick Smythies (2017), p.33 ff.