I did a 3-part series over at the blog where I followed Providence Division Extra No. 2 (aka "PDX-2" aka "The Haddam Local" as it worked its way from its originating terminal of Fort Yard, New London, on the Shore Line to Old Saybrook, up the south end of the Valley Line to East Haddam, and back through the towns of Deep River and Essex.
Instead of trying to cram all that here, just click on the following links to get to each part:
Part 1 - New London to Deep River