Siege Of Delhi
Four-part reel (or maybe a march) popular with bagpipers. Martin Carthy has a great version of this although I think his is slightly different. I like to play it on mandolin.
…I like to play it on mandolin, in Gmaj.
It is a 2/4 pipe march. The first bar kind of implies that it is a march. A mixolydian would be used for a pipe setting. I seem to recall that Martin Carthy got the tune from Hamish Henderson. The earliest pipe book I can find in reference is "The Scottish Pipers’ Society Book of Tunes", in 1912.
I just found that the Bledlow Cross hankie dance has been done to this tune, there is a clip of it being played morris-style here http://berkeley-morris.org/tunes/index.html