Peter de Rose.
Rose had form in the songwriting stakes (Somebody Loves me; Deep Purple; On a Little Street in Singapore and Bueno Sera among others) so it's not surprising he did a job on The Lamp is Low - as did Horsfall.
Sonny Rollins: "I work very hard. I wear out suits playing." - (Downbeat May 29, 1969.)
Bob Brookmeyer: "The group's philosophy? We're saving to buy new uniforms - the ties wore out." - (Crescendo March 1965).