As Chatwin finally sails away from Patagonia he is treated to a rendition of La Mer by a Chilean businessman. There are two possible candidates:
The unexpected hit by French singer Charles Trenet, which has since gone on to be recorded by hundreds of artists, including Bobby Darin. Listen on Spotify: Charles Trenet: La Mer Bobby Darin: Beyond the Sea
Whichever, we can only assume it would have been a very bad rendition; played on a piano 'missing many of its keys.'