“The emblem of the Hell’s Angels, termed ‘colors,’ consists of an embroidered patch of a winged skull wearing a motorcycle helmet. Just below the wings of the emblem are the letters ‘MC.’ Over this is a band bearing the words ‘Hell’s Angels.’. . .
    Another patch worn by some members bears the number ‘13.’ It is reported to represent the thirteenth letter of the alphabet, ‘M,’ which in turn stands for marijuana and indicates the wearer thereof is a user of the drug.”

—Hunter S. Thompson, Hell’s Angels, 1967.