Listening to the second album "The Book Of Taliesyn" released in October 1968 just 3 months after their previous album. The hurry was because of an extended tour of the USA which started on October 15 1968 with an appearance on the TV show The Dating Game with a performance and Jon Lord as a contestant. Song by Blackmore, Simper, Paice & Lord.
While “Smoke on the Water” paved the way for classical music in blues-rock, it’s this instrumental track off Deep Purple’s second album that highlights the band’s overall musicianship and Ritchie Blackmore’s guitar skills. By showcasing a harder edge to the English act’s psychedelic and progressive rock sound, the busy tune has been perfected for their live sets and is still performed today. -- watchmojo
"The best version of this song is on "Scandinavian Nights" double live album from 1970. The playing time is 34 min. 22 sec. of this song. :-) If you want this album I may share with you. Just please me. :-)"
Agreed though Live In Stockholm is pretty epic too :-)