| RefNo | HS/14/17 | 
| Level | Item | 
| Title | Letter, from Sir William Pole to Cha[rle]s May, dated at 8 Great George St. | 
| Creator | Sir William Pole | 
| Recipient | Cha[rle]s May | 
| Date | 2 July 1856 | 
| Description | Autograph letter signed by sender. Claims himself perfect case of di-chromic vision, only seeing blue and yellow. Gave paper on his condition to Royal Society [of London], quoting and supporting John Frederick William Herschel's theory. Hears John Frederick William Herschel is ill, or would send letter directly to John Frederick William Herschel. | 
| Language | English | 
| Extent | 3pp | 
| Format | Manuscript | 
| Place origin | 8 Great George St., London | 
| Origin coordinates | 51.5012, -0.12867 | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel1984 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA5890 | Pole; William (1798 - 1884) | 1798 - 1884 | 
| NA2178 | May; Charles (1800 - 1860) | 1800 - 1860 |