???? - 1803
London merchant, partner with his nephew Crawford Davison the elder (q.v.), and MP for Mitchell 1799-1802.
http://www.historyofparliamentonline.org/volume/1790-1820/member/simpson-john-1803 [accessed 31/05/2017]. The entry is tentative about the identification of the MP.
Davison, Simpson & Davison
West India merchant
1799 - 1802
Uncle → Nephew
Stamford Hill, London, Middlesex, London, England
10 Charlotte Street, Bedford Square, London, Middlesex, London, England