Educated at home, Elizabeth apparently had read passages from Paradise Lost and a number of Shakespearean plays, among other great works, before the age of ten. By her twelfth year, she had written her first “epic” poem, which consisted of four books of rhyming couplets. Two years later, Elizabeth developed a lung ailment that plagued her for the rest of her life. Doctors began treating her with morphine, which she would take until her death. While saddling a pony when she was fifteen, Elizabeth also suffered a spinal injury. Despite her ailments, her education continued to flourish.