| RefNo | CLP/3i/46 | 
| Level | Item | 
| Title | Cyphers, two cyphers by Christian Huygens and Chr [Christpher] Wren | 
| Date | [1669] | 
| Description | Paper containing two cyphers, one by Christian Huygens containing an inversion, sent in a letter to the Royal Society on 6 February 1669 and shown to the Society on 21 February 1669. Wren's cypher was communicated the same day and ordered to be sent to Huygens.
  Subject: Mathematics
  Read to the Royal Society on 4 February 1669 [likely inaccurate given dating surrounding Huygens' cypher]. | 
| Extent | 1p | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| RelatedRecord | RBO/4/15 | 
| RBO/4/14 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA8062 | Huygens; Christiaan (1629 -  1695); natural philosopher | 1629 -  1695 | 
| NA8299 | Wren; Sir; Christopher (1632 - 1723); architect, astronomer, and mathematician | 1632 - 1723 |