Bronte expert Ann Dinsdale came to the rescue of Dave Foster to help identify the location of one of the paintings by his grandfather, Walter Foster.

Mr Foster, who is researching the history of the Aireville Group of artists at the turn of the 20th century, has had a number of his grandfather’s works of art turned into prints. Among them are seven of the Bronte country by Walter which are for sale at the Bronte Parsonage Museum in Haworth.

“I was actually under the impression that one was located between Druids and Thwaites Brow near Keighley. But Ann put me right. She recognised it straight away,” said Mr Foster.

Mrs Dinsdale, Bronte Parsonage Museum collections manager, said: “I know it as Rush Isle which overlooks Ponden reservoir and is still there but derelict.”

Walter Foster, who died aged 42 in 1929, was head of Salts School of Art in Saltaire and a graduate of the Royal College of Art.

The Aireville Group worked between 1890 and 1940 and included Augustus Spencer, of Silsden, who became Principal of the Royal College of Art.