The Scottish folk song Bonnie Banks O' Loch Lomond. From what I was told the back sorry of the song is there were two brothers that were captured and they were told that one of them would be killed. One of the brothers decided that he would be the one to die and he is tilling his brother you take they high road (live), and I'll take the low road (die). At that time they believed that if you died outside of Scotland your soul would immediately end up back in Scotland, so the lyric "and I'll be in Scotland before you" meant that the dying brother's soul would be back in Scotland before the bother who lived could travel back to Scotland.
