What city did both Muddy Waters and Mel London live and work in together? 
Mel London:  He was active in the Chicago blues and R&B scenes in the 1950s and 1960s. Muddy Waters: McKinley Morganfield (April 4, 1913April 30, 1983), better known as Muddy Waters, was an American blues musician who is often cited as the "father of modern Chicago blues".
i don't know