I found various websites about the Montreal & SouthernCounty Railway, that ran on the South Shore through Greenfield Park. This site has some brief historical info. This page has 57 M&SC photos. Other good sites with pictures are here, here and here. The Bytown Railway Society has a book. Here is a couple of photos of the exterior and interior and the controls of M&SC #107 at the HCRR. This page from this East Greenfield website, has a list of M&SC stations.