Walter Henry (known as Harry) was born at Little Amwell, near Hertford Heath, Hertfordshire in the 3rd quarter of 1891, the third son of James and Elizabeth (nee Haggar) Clark. He was a pupil at the Merchant Taylor School in Ashwell, Hertfordshire.
Harold Christopher was the 3rd son of Herbert and Annie Maria (nee Reynolds) Clements born in Ashwell, Hertfordshire on 25 December 1895. He was a pupil at the Merchant Taylors School in Ashwell.
Albert was born at Ashwell, Hertfordshire on 3 December 1889, the 2nd son of George Goodchild Covington and Emily (nee Waldock) Covington. He was a pupil at the Merchant Taylors School in Ashwell.