Robin Catalogue:
A. MS, n.p., [c.1895], pp. 1, 5-9, 7-18, 18-20.
Several definitions of “mathematics,” including Aristotle’s and CSP’s. Mathematical proof and probable reasoning...

Robin Catalogue:
A. MS., n.p., [c.1903?], pp. 1-16, with 3 rejected pages; 17-19 of another draft.
Mathematics as dealing essentially with signs. The MSS. below (Nos. 8-11) are...

Robin Catalogue:
A. MS., G-c. 1896-3 [sup(2)G-c.1896-3], pp. 1-47.
Published, in part, as 1.43-125. Unpublished: on blocking the path of inquiry; Ockham’s maxim and...