Maps
| Place Name | George ; Montagu Pass |
| Title | Comparative Diagram of gradients |
| Date | 1880 |
| Scale | [Unspecified] |
| Dimensions | 21 x 30.5 cm |
| Place of Publication | Cape Town |
| Publisher | Saul Solomon |
| Date Published | 1880 |
| Series | G |
| series No | 45K |
| Year | 1880 |
| Source | Annexures to the Votes and proceedings of the House of Assembly/Legislative Council |
| Source Volume | II |
| Source Date | 1880 |