Heavy Horses is the eleventh studio album by Jethro Tull, released on 10 April 1978. It is considered the second album in a trilogy of folk-rock albums by Jethro Tull, although folk music's influence is evident on a great number of Jethro Tull releases. The album abandons much of the folk lyrical content typical of the previous studio album, Songs from the Wood, in exchange for a more realist perspective on the changing world. Likewise, the band sound is harder and tighter. The album reached No. 19 on the Billboard 200 album chart,[1][3][4] and peaked at No. 20 on the UK Albums Chart.[5] The third album in the folk-rock trilogy is Stormwatch.This album was the last studio album to feature John Glascock playing bass on all tracks.
Side one "...And the Mouse Police Never Sleeps" – 3:11 "Acres Wild" – 3:22 "No Lullaby" – 7:55 "Moths" – 3:24 "Journeyman" – 3:55Side two "Rover" – 4:17 (The 2003 remastered CD has the string tracks removed for an unknown reason) "One Brown Mouse" – 3:21 "Heavy Horses" – 8:58 "Weathercock" – 4:02
Ian Anderson – Vocals, flute, mandolin, acoustic guitar, whistles Martin Barre – electric guitar Barriemore Barlow – percussion, drums John Evan – organ, piano David Palmer – keyboards, pipe organ, orchestral arrangements John Glascock – bass guitar, (uncredited) backing vocalsGuest musician: Darryl Way – violin on "Acres Wild" and "Heavy Horses".