Saxophonist Edmund “Leon” Henderson, an important presence on the Detroit jazz scene in the 1960s and the youngest brother of tenor titan Joe Henderson, died of natural causes on the evening of Feb. 4-5. He was 75. He is perhaps best remembered for his contributions to the 1969 Blue Note LP Introducing Kenny Cox and the Contemporary Jazz Quintet. Two of his compositions, “Diahnn” and “Eclipse,” were included on that recording. One other tune from the LP made it onto Blue Note’s recent benefit project Detroit Jazz City.