 The band 's second LP Ars Longa Vita Brevis featured an arrangement of the Intermezzo from the Karelia Suite by Jean Sibelius , which the band 's friend Roy Harper had recommended they covered , and the album 's second side was a suite which included an arrangement of a movement from J.S. Bach 's Brandenburg Concerto No. 3 . The group used an orchestra for the first time on some parts of the suite . The band were on the bill at the 1969 Isle of Wight Festival and briefly toured Ireland with Yes and the Bonzo Dog Doo @-@ Dah Band , which by all accounts was fraught with logistical problems . 
