Read below some information we have gathered around the Net about the Disappointments Rooms.
In the past such rooms were built to house members of the family who were considered "embarrassments" due to some "socially unacceptable" illness (such as mental retardation). They would be shut in the room from as young as possible, and live a secluded and unacknowledged existence. Shutaway children used to be shut into out-of-the-way existing, normal spaces - attics, basements, closets - or into easily-constructed spaces normally reserved for pets, such as kennels. They were kept during the 1800-1900s to remain out of the public eye.