The final line: "And the only tune My guitar could play \ Was, 'Oh the Cruel Rain And the Wind.'" is a reference to a real song, "Oh, the Wind and Rain (The Two Sisters)". You can read the lyrics here: http://sniff.numachi.com/pages/tiTWOSI10.html.
Apparently Dylan performed this folk song early in his career, and I'm guessing the tune of Percy's Song is somewhat similar. The lyrics describe completely different circumstances, but in the end, both instruments can only play, "Oh, the cruel rain and the wind."
The final line: "And the only tune My guitar could play \ Was, 'Oh the Cruel Rain And the Wind.'" is a reference to a real song, "Oh, the Wind and Rain (The Two Sisters)". You can read the lyrics here: http://sniff.numachi.com/pages/tiTWOSI10.html.
Apparently Dylan performed this folk song early in his career, and I'm guessing the tune of Percy's Song is somewhat similar. The lyrics describe completely different circumstances, but in the end, both instruments can only play, "Oh, the cruel rain and the wind."