After these three albums and extensive touring in the United States, their American record company, Tetragrammaton, went out of business, leaving the band with no money and an uncertain future. (Tetragrammaton's assets were assumed by Warner Bros. Records, who would release Deep Purple's records in the US throughout the 1970s.) Returning to England in early 1969, they recorded a single called "Emmaretta", named for Emmaretta Marks, then a cast member of the musical Hair, whom Evans was trying to seduce. This would be the band's last recording before Evans and Simper were fired..
In search of a replacement vocalist, Blackmore set his sights on 19-year-old singer Terry Reid, who declined a similar opportunity to front the newly forming Led Zeppelin only a year earlier. Though he found the offer "flattering", Reid was still bound by the exclusive recording contract with his producer Mickie Most and more interested in his solo career. Blackmore had no other choice but to look elsewhere.