Postcard circa 1910. The Marsalis Sanitarium “Cool, quiet, modern. Seven minutes’ ride from Dallas News office.” was located  at 45 Marsalis, which would put it in the vicinity of Lake Cliff. It was in operation as early as 1906, when Doctors Reuss & Smart advertised their availability for surgery there. By 1909 Dr. J.H. Reuss had an additional practice at the Wilson Building in downtown Dallas. I find no mention of the Marsalis facility after 1910.