Between 1967 and 1969, the original Deep Purple released a trio of excellent albums. Those records mixed elements of 60s pop with rock guitar, experimented with psychedelia, and even explored avenues of orchestral rock. The huge proto-metal work of the band’s next incarnation – makers of the classics ‘Black Night’, ‘Smoke On The Water’ and ‘Highway Star’ – has long overshadowed the earlier Purple outings, but tracks like ‘Shield’ and ‘Chasing Shadows’ provided a massive showcase for Ritchie Blackmore’s distinctive guitar work and things to come, whilst the epic ‘April’ proved this was a band with bigger ideas than most, and their ability for making other peoples’ material their own was almost as impressive.