Robin Catalogue:
A. MS., G-1908-1e, pp. 1-186, plus 161 pp. (running brokenly to p. 186).
Omitted from publication in the Collected Papers: further discussion of the relationships of the Aristotelian pattern; definition of “pure mathematics”; numbers as entia rationis; first valid argument for pragmatism involves the denial of the Absolute. Kind, class, and collection. Signs and predication.

CP, Cross-reference index:
“The Monist 1908 1909 series on mazes, plus unpublished mss.
(a) “Some Amazing Mazes,” 18(April 1908)227-241. Cf. Francis C. Russell, “Hints for the Elucidation of Mr. Peirce’s Logical Work,” The Monist 18(July 1908)406-415. In a letter to Russell, dated 6 July 1908 (Widener VB2a), Peirce says of this, “I must thank you for your very ingenious defense of me.” [CP] 4.585-593.
(b) “Some Amazing Mazes, [Conclusion], Explanation of Curiosity the First,” 18(July 1908)416-464. [CP] 4.594-642. “Supplement. 1908 May 24,” Widener IA 3. [CP] 7.535n6 is from it.
(c) “Some Amazing Mazes, A Second Curiosity,” 19(Jan 1909)36-45. [CP] 4.643-646.
(d) Reference to “The Third Curiosity” at [CP] 4.647n*.
(e) “Some Amazing Mazes, Fourth Curiosity,” (c.1909). The following are from it: [CP] 6.318-348, on various topics in metaphysics; 4.647-681, on classes and numbers, with 4.647 following shortly after 6.348.”