In 1751 Francis Blake Delaval (age 23) was elected MP Hindon. He held the seat until 1754.

In 1751. Arthur Pond (age 46). Portrait of [his sister] Rhoda Delaval (age 25) and her siblings Francis Blake Delaval (age 23), [his brother] Edward Hussey Delaval (age 22), [his brother] John Delaval 1st Baron Delaval (age 22), [his sister] Anne Hussey Delaval (age 8) and [his sister] Sarah Delaval Countess Mexborough (age 9).

Edward Hussey Delaval: In 1729 he was born to Francis Blake Delaval and Rhoda Apreece. On 17 May 1808 John Delaval 1st Baron Delaval died without surviving male issue. Baron Delaval of Redford in County Wicklow and Baron Delaval of Seaton Delaval in Northumberland extinct. He was buried at Chapel of St Paul, Westminster Abbey. Edward Hussey Delaval inherited Doddington Hall. On 14 Aug 1814 Edward Hussey Delaval died. Sarah Delaval inherited Doddington Hall.

Anne Hussey Delaval: Around 1743 she was born to Francis Blake Delaval and Rhoda Apreece. On 06 Oct 1759 William Stanhope and she were married. His third wife. The difference in their ages was 41 years. He the son of Philip Stanhope 3rd Earl Chesterfield and Elizabeth Savile Countess Chesterfield.

In 1754 Francis Blake Delaval (age 26) was elected MP Andover. He held the seat until 1768.

Before 07 Aug 1771 11 Downing Street, Westminster was the townhouse of Francis Blake Delaval (age 44).