Scenic locations? Piloting skill? "Saddle up"?
hope it doesn't have anything to do with this guy:
Air Commodore
Douglas Douglas-Hamilton, 14th Duke of Hamilton and 11th Duke of Brandon, KT, GCVO, AFC, PC, DL, FRCSE, FRGS
(3 February 1903 – 30 March 1973) was a Scottish nobleman and pioneering aviator.
http://en.wikipedia.org/wiki/Douglas_Douglas-Hamilton,_14th_Duke_of_Hamilton
"Flying in formation higher than any before;
Lord Clydesdale, as he was known, was chief pilot on the first flight over Mount Everest in 1933, flying a Westland PV-3 biplane. The extremity endured by the crews of these aeroplanes helped demonstrate the need for pressurised cabins in modern aircraft. It was also the first detailed and scientific survey of the Himalaya region. Indirectly, the expedition resulted in the formation of Scottish Aviation Ltd (now part of BAE Systems)."
Naw.. one does not normally saddle a Clydesdale....
... and we'd better not be going to Normandy mounted on Horsas...