Oldish Psych and Prog

From ProgressiveRock :
Jethro Tull had scored another two Top 10 singles in the UK with "Sweet Dreams" and "Witches Promise" prior to the release of this, their third album. "Teacher", the flipside of the later, would become an FM staple in the US. The success prompted their first headlining tour of America (Yes in support). For Benefit, their bluesy jazz took some substantial refinement into what would eventually become the Tull sound. In came Blackpool mate John Evan on piano and organ, but more importantly, out came Anderson the raconteur. Acoustic guitar in one hand, flute in the other, his highly original songwriting soared in such songs as "Sossity; You're a Woman" and "For Michael Collins, Jeffrey and Me". The album is darker and moody, but still exceptional: "Alive and Well and Living In" benefits (sorry) from Evan’s piano, while "Inside" reflects the less aggressive nature of the album. The album would reach No. 3 and No. 11 in the UK and US respectively. One for the books, Jethro Tull was now one of the first commercially accepted and successful Progressive rock acts, on par with Led Zeppelin. Bassist Glenn Cornick departed after the album, to be replaced by another John Evan alumnus, Jeffrey Hammond. His name should be familiar, as he was the subject of many prior Tull songs.