Myra Hayward, daughter of Auntie Cilla, who was a cousin of Jessie Emily Morris. To be more specific, there was a Thomas Morris who had two sons, Thomas and Moses (and two daughters Ellen and Lizzie). Jessie Emily Morris was one of Moses Morris' children, and Priscilla (Auntie Cilla) was one of (the younger) Thomas Morris' children. Priscilla married Allan Hayward, and Myra was their daughter.

See here for a portrait extracted from the same photograph.

Click here for a full-sized image, or here for the unretouched original scan.