Size
Date
Country
Artist
Sitter
Case

1/4
ca 1859
Kendal, UK
Possibly Moses Bowness
Possibly Agnes Swainson
Full case

Notes

"Agnes Atkinson, Lucy's mother (? Humble)"

Agnes Swainson married Thomas King Atkinson.
Their daughter Mary Lucy Atkinson married Mansfeldt Heron Humble.

Agnes was born around 1826, which would make her 33 in the photograph. Since she seems older, I suspect the note is wrong. Her mother's name was also called Agnes, it could possibly be her.