| Reference number | MS/257/3/4 |
| Alternative reference number | Sa.750 |
| Previous numbers | ES3/3/750 |
| Level | Item |
| Title | Letter from Nikolai Wladimirowtsch Khanikoff, 69 Great Russell Street |
| Date | 17 October 1870 |
| Description | Regarding the magnetic observations made by Mr Robert Lentz in 1868 and 1869. |
| Language | French |
| Extent | 2p |
| Format | Manuscript |
| Physical description | Ink on paper |
| Access status | Open |