By Tom King We continue our look back at the music of 50 years agoâ¦. When you hear the words âProcol Harumâ, what do you think of? Probably this⦠But this band was so much more than their 1967 smashâ¦and in 1971 they were still recording high level prog rock with their 5th LP âBroken Barricadesâ. 1971 seemed like a time for leaving in the rock & roll world. Like Joe Walsh/James Gang and Peter Frampton/Humble Pie before him, guitarist Robin Trower would leave the band after this LP and release a string of really good albums through the 70âs. The three things I take from this LP are: