| Reference number | NLB/36/214 |
| Alternative reference number | NLB/36 p127 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Messrs W J Mitchell, 6 Trinity Square, E.C. |
| Date | 19 September 1907 |
| Description | In reply to Mitchell's enquiry, Mr Brennan's patent had not been the subject of a report by the Royal Society. A working model of the rail was shown at the Society's Soirees and nothing more. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Manuscript |
| Access status | Open |