Sulivan was born in Ireland and moved to work for the East India Company, returning to England in 1753 with a moderate fortune, which enabled him to purchase Ponsbourne Park in Hertfordshire in 1761. He was elected a Director of the East India Company for 1755–8, 1764–5, 1769–70, 1771–2, 1778-80 and 1783 to his death. He was Deputy Chairman for 1763–4, 1772–3, 1780-1 and Chairman for 1758–9, 1760-2 and 1781–2. 
He had married in India and had 2 sons. Ponsbourne passed to his son Stephen, who sold it in 1811. His grandson, Laurence Sulivan (1783-1866) was a philanthropist, statesman and Deputy Secretary at War.
- The India list and India Office list for ... - Great Britain. India Office - Google Books
- "SULIVAN, Laurence (c.1713-86), of Ponsbourne Park, Herts". History of Parliament Online. Retrieved 10 December 2017.
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