Indian Summer was a progressive rock quartet, formed in Coventry, UK, in 1969. The members were Malcolm Harker on bass, Paul Hooper on drums, Bob Jackson on keys and Colin Williams on guitar and vocals. Their manager was Jim Simpson who was managing Black Sabbath at the time and he is supposed to have chosen Black Sabbath over Indian Summer, for recording a debut album. At last, Indian Summer's first and only album of the same name was released two and a half years later, in 1971.   Wikipedia