| Reference number | NLB/6/79 |
| Alternative reference number | NLB/6 p29 |
| Level | Item |
| Title | Copy letter from an unknown correspondent, to W B Keen |
| Date | 26 February 1892 |
| Description | In future four copies of the first proof of each 'Philosophical Transactions of the Royal Society' paper will be sufficient instead of six. The editor of 'Iron' has the author's permission and Keen may therefore make electros of the blocks indicated in the letter herewith enclosed [not attached]. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |