credits personnel keith emerson -- hammond organ , st. marks church organ , piano , celeste , moog synthesizer greg lake -- vocals , bass , electric guitar , acoustic guitar carl palmer -- drums , assorted percussion production recorded at advision studios , london in january 1971 produced by greg lake for e. g. records engineer -- eddy '' are you ready '' offord arranged and directed by emerson , lake & palmer paintings -- william neal ( c.c.s. assoc .