'In May [1937]', a Royal Air Force flight visited Nigeria, consisting of 2 Valentia and 5 Vincent type aircraft.' The seven planes are seen flying in formation in other photos by Mr Duckworth. The airport at Kano had opened in 1936 and Apapa aerodrome was being reclaimed from a swamp. The second Valentia is K3163 / N. Photo by: Edward Duckworth / Northwestern University Libraries, Illinois