MS 499 |
"On the System of Existential Graphs considered as an Instrument for the Investigation of Logic", s.f. (posiblemente 1906).
|
MS 801 |
|
MS 857 |
|
MS 866 |
[On the Reconciliation of Religion and Science], s.f. (posiblemente c. 1897).
|
MS 868 |
|
MS 1054 |
|
MS 1304 |
|
MS 1305 |
|
MS 1306 |
|
MS 1307 |
|
MS 1326 |
|
MS 1327 |
|
MS 1550 |
|