This beautiful lament by Turlough Carolan survives in the mid-19th-century Forde manuscript collection, reproduced by Petrie, with the additional title 'Parting from a companion’. Carolan composed it as a result of a joke that his good friend, Charles Mac Cabe, played on the blind harper, pretending that he was dead! By working on this piece we will learn how to 'reverse engineer' from a historical printed source to get back to a more plausible harp setting, both in terms of the actual notes to be played, and also in the likely phrasing of the original, before it was 'nailed down' in music notation.