| Reference number | NLB/4/924 |
| Alternative reference number | NLB/4 p382 |
| Level | Item |
| Title | Copy letter from Herbert Rix, to Dr David Bierens de Haan, Leiden |
| Date | November 1890 |
| Description | The Royal Society has only one edition of each of Hobb's works in the library but Rix will look out for other editions. De Haan's card came just in time to save any expense in the matter of the diagram. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |