From Mission to Madness: LAST SON OF THE MORMON PROPHET

Avery draws on a large body of correspondence for details of David's life and on his poetry to reveal his personality and emotional struggles. She tells of his mental deterioration, starting with a probable breakdown early in 1870 and ending with his death in 1904 in the Northern Illinois Hospital and Asylum for the Insane in Elgin, where he had been confined for twenty-seven years.