Moore's final, long-form poetic work was well-received at the time of its initial publication (though it also, admittedly, caused some disturbances in certain circles).The poem's basis is said to have been an amalgam of rabbinical and old folk tales, and centers around three distinct, fallen angels who find themselves enamored with human women. The overarching parable serves to cast light upon the moral decline of the soul, with a notable regard to the concept of purity.