| RefNo | HS/18/23 | 
| Level | Item | 
| Title | Letter, from William Wallace to Sir John Herschel, dated at 14 Argyle Square, Edinburgh | 
| Creator | Wallace; William (1768-1843); Scottish mathematician; astronomer | 
| Recipient | John Frederick William Herschel | 
| Date | 16 March 1824 | 
| Description | Please recommend London instrument makers to supply new Edinburgh observatory. Josef Fraunhofer was asked to make only lens for transit instrument, but wants to make entire instrument. [John Frederick William Herschel annotation: Recommended Fraunhofer for entire transit instrument and Robert Molyneux for clock.] | 
| Language | English | 
| Extent | 3pp | 
| Format | Manuscript | 
| Place origin | 14 Argyle Square, Edinburgh | 
| Origin coordinates | 55.938539, -3.191167 | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel7817 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |