Complex sentence: The Weehawken Historical Commission office and archives are located on the upper floor of the library and maintains materials originally contibuted upon the creation of the library as well as other acquisitions made over the years.
Split into simpler sentences: The Weehawken Historical Commission office and archives are located on the upper floor of the library. The collection includes materials originally contibuted upon the creation of the laibrary as well as other acquisitions made over the years.