Sylvia Plath died by suicide on February 11, 1963, at the age of 30. She sealed the room she was in, placed her head in the gas oven, and turned on the gas, leading to carbon monoxide poisoning. Before doing so, she carefully prepared her children’s room to protect them, leaving them milk and bread, and sealing their door to prevent the gas from reaching them. She also left a note with the phone number of her doctor, Dr. John Horder, to be called. Plath had been struggling with severe depression, recent flu illness, the collapse of her marriage to poet Ted Hughes, and professional setbacks. Despite being prescribed an antidepressant, her mental state worsened, leading to her taking this final tragic step.