Prob. Harriet Mary Sturt (1822-1877) (perhaps Anne Gore 18..-1877,
2nd wife of Richard W. P. Curzon-Howe, 1st Earl Howe).
Daughter of Henry Charles Sturt and Charlotte Penelope Brudenell.
She married 1846 with George Augustus Frederick Louis Howe, 2nd Earl Howe.
The image below is slighty enlarged compared to the original cdv size photograph.
"Viscountess Curzon"