Title of article by John Jenkin about Lawrence Bragg and his work on sound-ranging.

My grandfather, John Byrne can be seen standing on the right hand side of the photograph in a prisoner of war camp. The man beside him is unknown. In the background of the photograph one can see small buildings and no other person can be seen in the photograph.

The Hanna family, who lived in East Dulwich, London, can be seen in one of the photographs. It shows my father (centre) and his three brothers, my uncles, who all fought in WW1. Arthur Edward Hanna (born 1888 Taunton – 1917 k.i.a) is standing top left while Francis Charles Hanna, or Frank (1885 Taunton – 1933 Arundel) is seated below him. My father Walter John Hanna (1891 Dulwich – 1960 Bath), who served in the Civil Service Rifles during WW1, losing an eye in Passchendaele, is in the centre. Hugh Hanna (1894 Dulwich – 1970 Frome), who won the Military Medal in WW1, is seated on the floor. My grandmother, Elizabeth Hanna, nee Horder (1856 Yeovil – 1944 Patcham) is seated left, while my aunt, Frances Hanna (1883 Tralee – 1977 Bath), is standing at the back.