Analysis of information sources in references of the Wikipedia article "Immigrant Song" in English language version.
The band cleaned up with its performance at Bath, from the opener, a new number called 'Immigrant Song', to its - count 'em - four encores.
The first Viking metal song ever, Immigrant Song might also be the first smudge of gothic rock evidenced by Plant's exotic pre-Dio vocal melodies which turn an almost casual, incidental song into a quickly attacking then evaporating classic.
...Led Zeppelin's "Immigrant Song" represents the first tick on the folk-metal timeline.