When I found a website on Sheffield Local History (http://history.youle.info/), one item was particularly interesting. It was a booklet written by an Eric S Roberts about his experiences in the first World War and published on 23rd May 1918. He was a Lieutenant in the Yorks and Lancaster Regiment. This must be the same Eric S Roberts who appears on the family tree in the 1971 Edition of "Some Memorials of the Family of Roberts" where it shows he was born on 17th May 1893. He was the youngest son of Sir Samuel Roberts 1852-1926.
He also signed a copy (along with all the other members of the Repertory Theatre, Sheffield) of "The Works of William Shakespeare" that was presented to my father after the production of "Sing a Song of Christmas" 1930-1931. He was 13 years old. Fourteen years later, he also was commissioned as a Lieutenant in ..... The Yorks and Lancaster Regiment.
Dad joined Sheffield Rep when he was quite young, as the following photograph demonstrates. Eric S Roberts is possibly the second on the left?