Maps
| Place Name | ase prolongation |
| Title | diagrams of points of base prolongation |
| Date | 1886 |
| Scale | no scale |
| Dimensions | small |
| Place of Publication | Cape Town > > |
| Date Published | 1887 |
| Series | G |
| series No | 21 |
| Year | 1887 |
| Source | Annexures to the Votes and proceedings of the House of Assembly/Legislative Council |
| Source Volume | i |
| Source Date | 1887 |