Iommi, Butler, Ward and Osbourne renamed the band Earth in September 1968. The same month Iommi briefly departed to join Jethro Tull. However, after only two performances (an appearance on "The Rolling Stones Rock & Roll Circus" in which the band mimed "A Song for Jeffrey", which Ian Anderson sang live and a live appearance at BBC), Iommi was back with Earth in November 1968.