Legendary lyricist Don Black discusses penning lyrics to the iconic theme song of international period-set hit series DOWNTON ABBEY and previews the atmospheric and moody new song in a new interview."Did I make the most of loving you? / So many things we didn't do / Did I give you all my heart good healing?" sings an ethereal operatic soprano (Mary-Jess) in the preview clip, giving voice to a the recent plight of Lady Mary with the passing of her husband while in young motherhood - a plot point upon which the premiere episode of Season Four of the series will purportedly center, though this song was actually penned prior to the events of last season.