The Queens County Sentinel began publication as a weekly newspaper in June 1858,  with offices in Hempstead NY. When Queens County was incorporated into Greater New York in January 1898, part of the county was separated. On January 1, 1899,  the separated portion was renamed Nassau County. At some time after that date the paper changed its name to the Hempstead Sentinel. The last edition of the Queens County Sentinel available on microfilm is dated May 26 1898., the first available issue of the Hempstead Sentinel is dated June 1, 1899. There is no record of what happend to the paper between those dates.