...David Hyrum Smith...youngest son of...LDS prophet, Joseph Smith...returned to a mission to Utah...Reorganized church prophet, Joseph Smith III, who the letter was addressed to, must have regretted extending the call, writes Valerie Tippetts Avery, author of “From Mission to Madness: Last Son of the Mormon Prophet...” To young David...the mission...served to convince himself...that he had spent years angrily refuting — that his father...preached and practiced polygamy. ...David...Smith took his...skepticism...further, arguing against...dogma that man can only seek important further knowledge from a selected prophet. This doubt struck at a key doctrine of both churches. He wrote: “If faith unto salvation was...