sentences:  The South Puget Sound Regional Library, which comprised Mason and Thurston counties, threatened to leave the demonstration later in 1966 over the effectiveness of the program for their counties.After months of negotiation, the two counties reversed their decision, allowing the demonstration project to continue for another two years.On November 5, 1968, residents of unincorporated areas in the five counties approved the establishment of an intercounty rural library district, with four counties having large margins in favor of the library.