| Reference number | NLB/61/262 |
| Alternative reference number | NLB/61 p155 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Messrs Sanchez, Eraso & Co.; 16 Water Lane, E.C.3. |
| Date | 10 June 1921 |
| Description | Informs Messrs Sanchez, Eraso & Co. that the Society has not yet received any communications from Mr. Planas of Barcelona with regard to the quadrature of the circle. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |