Listen to Omar Khayyam: Part I: So when that Angel of darker drink (Beloved) online. Omar Khayyam: Part I: So when that Angel of darker drink (Beloved) is an English language song and is sung by Catherine Wyn-Rogers. Omar Khayyam: Part I: So when that Angel of darker drink (Beloved), from the album Bantock: Omar Khayyam, was released in the year 2007. The duration of the song is 2:18. Download English songs online from JioSaavn.