Dickinson was the son of Major General Thomas Dickinson, of the Honourable East India Company's Engineers, and of Hurstpierpoint. He was educated at Eton College and was called to the bar at the Inner Temple in June 1839. He was chairman of Board of Guardians at Stroud, and chairman of 2nd Court of Quarter Sessions for Gloucestershire. He was a J.P. for Gloucestershire and a captain in the 5th Gloucestershire Rifle Volunteers. He was also a Fellow of the Heraldry Society and a Fellow of the Royal Geographical Society.
At the 1868 general election Dickinson was elected as a Member of Parliament (MP) for Stroud. He was re-elected at the 1874 general election, but in April 1874 his election was declared void.
- Debretts House of Commons and the Judicial Bench 1870
- Leigh Rayment's Historical List of MPs – Constituencies beginning with "S" (part 5)
- "No. 23444". The London Gazette. 24 November 1869. p. 6108.
- "No. 24063". The London Gazette. 6 February 1874. p. 540.
- Hansard 1803–2005: contributions in Parliament by Sebastian Dickinson
- Stratford Joseph Gloucestershire Biographical Notes
|Parliament of the United Kingdom|
|Member of Parliament for Stroud
1868 – 1874
With: Henry Winterbotham to Jan 1874
John Dorington Jan 1874 – Feb 1874
Walter John Stanton Feb 1874 – May 1874
Alfred John Stanton
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