The sad story of the Dalsons is recounted in Mrs. Dalson's Diary. The farmers tried as long as they could to defend themselves. When Harold Dalson became ill with the plague and started transforming, his brave yet scared wife carried and pushed his twitching body into the only place she thought could hold her husband: the Outhouse. She kept the key with her so that he could never be released. Sadly, the Scourge overran the farm that very night, and she rose as the Wandering Skeleton.
According to official lore, skeletons are exclusivly male. However, this is told to be female. Blizzard has yet to post on why this is.