[1] After undertaking their maiden gig, former Wonderful Radio London DJ and agent, John Edward,[2] offered to manage the fledgling outfit.

[1] The majority of the tracks were re-workings of older Chicago blues material, although the only true cover version therein was of Willie Dixon's "You Need Love".

[1] The band were again indebted to Edward, who arranged for them to appear at the California Ballroom in Dunstable, where they supported Ten Years After, Jethro Tull, Chicken Shack, and The Herd.

In 1969, the band expanded their loyal fan base when undertaking two UK nationwide concert tours with the American bluesman, Freddie King.

[5] Following the release of Killing Floor and a couple of BBC Radio 1 sessions, Lou Martin left the band, and they continued for a while as a four piece.

[5] In 1970 and 1971, further line-up changes took place which included the former Juicy Lucy vocalist Ray Owen, drummer Rod de'Ath, and bassist Mick Hawksworth, joining the band.

[12][13] It was dedicated to the late Hubert Sumlin, who had been the lead guitarist on Howlin' Wolf's recording of the song "Killing Floor".