Crocker McElwain Paper Mill The Crocker McElwain Paper Mill has been located in many different parts of Holyoke during its history. They were in the HWP Mill from 1903 to 1966. Sanborn map analysis: Sanborn 1884 map Sanborn 1889 map Sanborn 1895 map – does not exist yet Sanborn 1915 map Sanborn 1949 map Sanborn 1956 map