I was born in Sibley Hospital during WW II when it was on North Capital Street. I also remember visiting the emergency room there when I was about 8 or 9, after a neighbor boy hit me on the head with a brick. They closed it down after building a new Sibley in Northwest D. C. I don't think it was ever a sanitarium. I do have an ancestor who was a "boarder" in the Washington Home for the Incurable in the 1910 census. This was located at 32nd and S Streets N. W. per the address given. In a google search I found the Washington Sanitarium & Hospital, with no information as to it's location. There was also the Takoma Sanitarium, now the Adventist Hospital in Takoma Park, MD, just outside of the District. The Washington Historical Society may have information on former hospitals and sanitariums in D. C. here's a link to their catalog about items involving the Washington Sanitarium. (http://www.citymuseumdc.org/Do_Research/research.asp) Carolyn