This is actually recieved from the quest NPC outside the lighthouse after you turn the waterlogged book that drops from the troubadour. You take this to the bard to the left of the bard guild entrance in south Qeynos. You will then recieve another book to bring back to guy at lighthouse. You will recieve the song named above after that turn in. GL to all the bards looking to do this quest. I have only been to the troubadour camp once that it was not camped. Most of those times was not camped by bards so they were more then happy to send tells to those looking for the book.