 They went out back to the White House tennis court to play a game. Calvin Jr. was not wearing socks. He developed a blister. It seemed harmless at first, but soon became infected. The infection would take over his body. Although Calvin Jr. had the best medical care available at the time, not even those doctors could save him. Writing in his memoir, Calvin Coolidge says, In his suffering, he was asking me to make him well. I could not.