Jethro Tull, blues band? You mean that flute-wielding, tights-wearing, concept album-making, prog band? And lets not forget, winner of the first-ever Grammy for hard rock/metal album (chortle). But yes, dear reader, this was 1968, and every respectable new band in England was in blues, whether it was Fleetwood Mac or the New Yardbirds/Led Zeppelin. So you had Mr. Anderson and crew appearing on the BBC covering Sonny and Brownie, singing "My baby left me, my mule got lame/Lost all my money in a poker game." Plus, he was playing blues harp.
The thing is, they were a very good blues band, and Anderson did take out the flute and make it sound pretty good in that style. About half the songs on this debut album are instrumental, and the fledgling band had a smooth jazz/blues style, which hinted at interesting things in the future. Vocal numbers such as My Sunday Feeling were more modern and melancholy. Others, including Beggar's Farm, had a Mose Allison-meets-Aqualung mix, and allowed for lots of riffing, from both our favourite flautist and the guitar stylings of Mick Abrahams.