Mary Boland Cafferty died of chronic Nephritis and Myocarditis on July 30, 1950. Residence at time of death was 4024 Ridge Ave.
Nephritis is a kidney disorder in which the spaces between the kidney tubules become inflamed. This condition can lead to acute kidney failure.
Myocarditis is an inflammation of the myocardium, the middle layer of the heart.
It appears Aunt Mary went into Kidney failure followed by Heart failure.