The Lost Souls never released any records, yet the meager recorded evidence that survives indicates that they were one of the finest unknown American groups of the mid-'60s, able to write both catchy British Invasion-type rockers and, in their latter days, experimental psychedelic pieces with unusual tempo changes and song structures. The band were also unusual in their occasional embellishment of the typical period guitar-bass-drums lineup with flute, sax, and mandolin. Although popular in their Cleveland hometown, they broke up in 1968 to attend college. Rhythm guitarist Den...