Putrefaction established the Carcass template of growled or gurgled lyrics to a brutal grindcore backdrop. The titles (and the controversial cover of the LP) revelled in medically explicit detail (e.g. Vomited Anal Tract, Fermenting Innards and Regurgitation Of Giblets), but resulted in two Peel sessions, which came towards the end of JP's fascination with the genre. The band continued to progress, and their second LP Symphonies Of Sickness saw the adoption of longer songs, more structure and eventually a move toward melody, as evinced by Heartwork (1993), credited with establishing melodic death metal as a genre. The band signed to Columbia Records but disintegrated during the much-delayed final album, Swansong, which was released nearly a year late and on their original label, Earache.