| Reference number | NLB/72/724 |
| Alternative reference number | NLB/72 p390 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Frank Dyson, KBE, FRS |
| Date | 22 March 1930 |
| Description | Asks Sir Frank Dyson to help obtaining a photograph of the new planet [Pluto, discovered in February 1930] to show at the Soiree on 14 May. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |