The 1871 Beers Atlas map of Montague includes a town-wide map, as well as detail maps of Turners Falls, Millers Falls, Montague Center and Montague City. In addition to streets and physical boundaries, the maps contain names of property owners and businesses, as well as some special features such as the "Fossil Footprint Quarry."
Our friends at old_maps.com have compiled a fantastic collection of historic maps of the region. I will bring a copy of the "Early Maps of Montague" publication, compiled for the 250th Celebration in 2004. We might want to undertake the task of indexing the names on the maps. Gill has recently done this and it could be a great help to other researchers.
Carnegie Library has acquired a complete set of the Sanborn Fire Insurance Maps which show buildings very accurately for several years between 1844 and 1914 in the more built-up areas in town, including Riverside in Gill. They are very useful for visualizing the wide variety of downtown businesses over the years.