Iron Maiden's only constant member since their inception was credited for a song on what album?
Run to the Hills: "Run to the Hills" is a song by the English heavy metal band Iron Maiden. Run to the Hills:  It was released as their sixth single and the first from the band's third studio album, "The Number of the Beast" (1982). Steve Harris (musician):  He has been the band's only constant member since their inception in 1975 and, along with guitarist Dave Murray, to have appeared on all of their albums.
The Number of the Beast