Cumberland County Historical Society
The Cumberland County Historical Society runs several museums in Greenwich N.J.:
The Gibbon House is open Tuesday-Sunday from 1-4 pm but is closed January, Febuary, and March.
The Warren and Reba Lummis Genealogical and Historical Research Library is open Wednesdays 10-4 and Saturdays and Sundays 1-4. It's closed from the middle of December to the 1st week of Jan.
The Alan Ewing Carman Museum of Prehistory in Cumberland County is open Wednesday, Saturday, and Sunday from 12-4 all year.
The John Dubois Maritime Museum is open from 1-4 on Sundays.
Millville Historical Society
The Millville Historical Society operates a museum located in Millville on the corner of 2nd and Main Streets (Route 49). They have some interesting files on Maurice River Township there. The Library at 2nd and Main is open from 1:00 p.m. to 4:00 p.m. on Wednesday and Sunday.
The Wild and Scenic Maurice River
The Wild and Scenic Maurice River website contains some history on the area and its rivers, as well as providing a virtual river tour, some information on the threatened and endangered species in our watershed, and a listing of restaurants and other amenities in the region.
Citizens United is a environmental group that has a very nice history section about the Maurice River area on its River Reach site map and accompanying recollections. Here is the link to that page.