Notes:

--- "Windsor and Eton Express" 18 Jul 1840, page 4:
Sudden Death. -- Yesterday morning Sir Mark Singleton, who was staying at Sunninghill Wells for the benefit of his health, suddenly expired. An inquest has since been held on the body, and a verdict returned of "Died by the visitation of God."

--- "Morning Chronicle" 21 Jul 1840, page 5:
Sir Mark Singleton, who had been sojourning at Sunning-hill, where he has lately taken up his residence for the restoration of his health, was suddenly seized with illness on the morning of Friday last, and in the course of a few minutes he was a corpse.

--- "Globe" 22 Jul 1840, page 3:
The late Mark Singleton, Esq., whose sudden demise, at Sunninghill, we announced on Monday, was son-in-law of the celebrated Charles, first Marquis Cornwallis, Governor-General of India, having married his lordship's only surviving daughter, Lady Mary Cornwallis, November, 1785. Mr. Singleton, who formerly held the office of storekeeper of the ordnance and other official appointments, was in his 79th year.

--- "Reading Mercury" 25 Jul 1840, page 3:
On Friday, an inquest was held . . . at the Wells Inn, on the body of Sir Mark Singleton, who had been staying there for the benefit of his health, but had died suddenly. Verdict, "Died by the visitation of God."

Mark married Mary Cornwallis in Nov 1785 in Scotland. Mary (daughter of Charles Cornwallis and Tulleken Jemima Jones) was born on 28 Jun 1769; was christened on 23 Jul 1769 in St. James, Westminster, Middlesex, England; died on 26 May 1857 in 37 Curzon St., London; was buried on 01 Jun 1857 in Kensal Green (All Souls' Cemetery), London. [Group Sheet] [Family Chart]