Listen to An Unmarked Grave (In Memory of Butch Casidy and the Sundance Kid) online. An Unmarked Grave (In Memory of Butch Casidy and the Sundance Kid) is an English language song and is sung by Up and Bustle & Out. An Unmarked Grave (In Memory of Butch Casidy and the Sundance Kid), from the album One Colour Just Reflects Another, was released in the year 1996. The duration of the song is 5:26. Download English songs online from JioSaavn.