A few years ago, I was watching a burial of 6 boys from Massachusetts that were killed during the battle of 1st Manassas. During the funereal, the fifes and drums were playing a funeral march that I loved but couldn't find the music too!

Years later I finally found the tune on a CD I got from one of the many giftshops in Gettysburg, and it's called Rosaline/Rosalind/Roslin Castle (its spelling can differ quite a bit XP).

http://www.youtube.com/watch?v=l2A2lm46RoE