Hello, When you do a Google search for "Sanitariums, Massachusetts," you don't get too many "hits." Part of the reason is that this has different spellings. My Webster's dictionary gives the main spelling as Sanitarium, with the word originating in 1851. But, it gives the alternate spelling of Sanatorium. (Some people could spell it Sanitorium.) Because I was born in a hospital which was just a very large house which was used as a hospital, I'm wondering if the first Sanitariums in MA were in very large houses which were used as Sanitariums. For instance, the web site for the "Center for Lowell History" mentions a "RING and STEARNS Sanitarium" in Billerica in 1915. I don't remember their being any "hospital looking buildings" in Billerica, so I'm wondering if it was another case of a very large house in the town being used as a Sanitarium. (It's mentioned in the records of well-known, landscape architect, Warren MANNING, of Billerica.) Betty (near Lowell, MA) P.S. In the "Historic Asylums" web site I already mentioned, I think a Sanitarium in Middleton, MA, was mentioned. I just checked my MA map and Middleton is one town over from North Reading.