Finding the music

Had a sore throat, and it was too cold to ride, so I worked on my book.
I wanted to find the right music for when the British came to town

Unfortunately, "Garryowen" dates from 1860, and is really associated with the US Army.
Let's try this, then.

Sorry, not early enough. Guess I'll have to leave up to the imagination.
When the Americans come back? That's easy.