From the Robin Catalogue:
A. MS., G-1898-1, pp. 1-37.
This is the last of the proposed set of eight lectures of 1898. Published, in part, as 6.185-213 (pp. 7-10 and 21-37). Unpublished is material on the history of geometry (pp. 1-7). Geometrical topics; continuum; Listing Numbers (pp. 10-20).
Published as RLT 242-268.