[2] In 1661 he married Sarah, daughter and co-heiress of Sir Edward Alston and widow of George Grimston[1] in exchange for a dowry of £10,000.

Her father negotiated an independent income of £300 per year for his daughter and additional clauses to cover the possibility that she became a widow.

[1] Although the voters of Marlborough usually accepted the Seymour family's nominee, on this occasion the seat was contested and he received only one more vote than his rival.

[4] Unhappy in his marriage and having fallen out with his nephew's guardian and his mother, he entered Gray's Inn in 1666 in order to escape his creditors.

[1] He succeeded his nephew as the 4th Duke of Somerset in 1671, but much of the family estate was inherited by his niece Elizabeth, who subsequently married Thomas Bruce, 2nd Earl of Ailesbury.