| Reference number | AP/39/20 |
| Level | Item |
| Title | A System of Train-Signalling, by Which Also Disabled Trains May Telegraph for Assistance without the Aid of Portable Apparatus |
| Date | 9 March 1857 |
| Description | Paper by Charles Walker, with illustrations. |
| Extent | 11 sides |
| Format | Manuscript |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA3784 | Walker; Charles Vincent (1812 - 1882) | 1812 - 1882 |