Edward was born in the Hitchin District, Hertfordshire on 4 December 1887, the fourth son of William and Jane (nee Giles) Gray.
Lewis was born on 2 December 1883 in Ashwell, Hertfordshire, the second son of John and Emily (nee Huffer) Huffer. He was a pupil at the Merchant Taylor School in Ashwell.
Frederick was the only son of Abraham and Elizabeth (nee Tapping) Walker, born in the 1st quarter 1889 at Caxton District, Cambridgeshire. At the age of 12 Frederick was living in Ashwell, Hertfordshire and was a pupil at the Merchant Taylors School in Ashwell.