This is her article from thepeerage, "Susannah Barret F, #486181, d. 31 August 1823
Susannah Barret married Sir Justinian Isham Isham, son of Euseby Isham and Elizabeth Panting, on 9 September 1766. She died on 31 August 1823.
She was the daughter of Henry Barret. Her married name became Isham.
Children of Susannah Barret and Sir Justinian Isham Isham
Sophia Isham d. 1851
Louisa Isham
Sir Justinian Isham Isham+ b. 24 Apr 1773, d. 23 Mar 1845
Vere Isham+ b. 13 Sep 1774, d. 27 Feb 1845
Henry Charles Isham+ b. 14 Feb 1777, d. 1 Apr 1833."
From bbc.co.