Description: 'Jedidiah Buxton' [farm labourer of Elmton, 1707-1772 who rose to prominence, although he was illiterate, because of his prodigious mental skills in arithmetic, being acknowledged by the Royal Society in 1754], half-length, painted and published by B Killingbeck, Berkeley Square, made by J Spilsbury, 1 May 1773, mounted on card