During these last years at Idlewild, Willis continued contributing a weekly letter to the "Home Journal". In 1850 he assisted Rufus Wilmot Griswold in preparing an anthology of the works of Poe, who had died mysteriously the year before. Griswold also wrote the first biography of Poe in which he purposely set out to ruin the dead author's reputation. Willis was one of the most vocal of Poe's defenders, writing at one point: "The indictment (for it deserves no other name) is not true. It is full of cruel misrepresentations. It deepens the shadows unto unnatural darkness, and shuts out the rays of sunshines that ought to relieve them".