John Bury (bottom left) aloft 3 July 2011 - the Rev John Mackenzie Bacon was the brother of his great grandfather

Father and daughter - Rev John Mackenzie Bacon #280 and Gertrude

Gertrude was author of numerous books on flying, including this one about her father.

From The Guardian's 27 July 2006 preview of the 'Aerial Photography and Archaeology' exhibition; photos from English Heritage

Lt Philip Henry Sharpe's 1906 shot of Stonehenge

Neolithic and Iron Age earthworks at Hambleton Hill Dorset (1928)

A Neolithic Bronze Age crop mark in Eynsham, Oxfordshire (2003)

A recent view of earthworks in Wansdyke, Wiltshire