Unfortunately little is known about Clark's Sanitorium, a small Martinsville spa which was advertised at the time as being the only sanitarium for blacks in the U.S. It was opened on North Main Street by an African-American Martinsville resident named Willis Clark, who worked at the Highland Sanitorium. Clark's targeted well-heeled blacks from Indianapolis, Louisville, Chicago, and Cincinnati who were not permitted to share the same spa or hotel accommodations as whites at that time. Clark's advertised in The Indianapolis Recorder in February 1902, Indianapolis black community newspaper, touting hot and cold mineral baths. The ad ran: Open all the year. The only colored sanitorium in the country, is making wonderful cures of rheumatism and stomach troubles. After its first year of existence, the spa seems to have closed. Although white businessmen in Martinsville were willing to assist in financing the sanitarium if it proved successful, it was not long-lived.