Sir Henry St John Carew St John-Mildmay, 4th Baronet (15 April 1787 â 17 January 1848), of Dogmersfield Park, Hampshire, was an English politician.
St John-Mildmay was born on 15 April 1787. He was the son of Sir Henry St John-Mildmay, 3rd Baronet of Dogmersfield Park and Jane Mildmay, the daughter and co-heiress of Carew Mildmay of Shawford House, Hampshire.
He was educated at Winchester School from 1798 to 1802, and Christ Church, Oxford, graduating in 1805.
He was a Member of Parliament (MP) for Winchester 1807âÂÂ1818 and Mayor of Winchester for 1808.
He succeeded his father in the baronetcy on 11 November 1808.
On 7 August 1809 he married Charlotte Bouverie, the daughter of Hon. Bartholomew Bouverie and Mary Wyndham Arundell. Before her death following childbirth, they were the parents of one son:
In 1815, five years after Charlotte's untimely death from giving birth to their son, he eloped with her sister Harriet, Countess of Rosebery ( Bouverie), the wife of Archibald Primrose, 4th Earl of Rosebery in Stuttgart, Württemberg. Before Harriet eventually left him, they had three sons:
Plagued by financial problems, he shot himself on 17 January 1848.