This is possibly Isabella Hopkins who was born on 26 May 1866, the daughter of Everet and Isabella Hopkins of Deloraine.
Alternatively, this may be a sister of Edith and Margaret Hopkins who also appear in the Album and were in the Exhibition Choir. Amelia was born on 1 Jun 1863 and Agnes on 4 May 1866. A brother Alfred married Lyla Hunt in 1896. She is also in the Album.
Miss Hopkins was a soprano in the Exhibition Choir in 1891-92.