When researching the history of a particular town, check what the local media had to say on the anniversary of its founding. Newspapers often print special editions at these times that contain a wealth of historical information.
Papers printed on a town’s centennial or bicentennial are a good place to start, but don’t discount the lesser anniversaries — the 50th, the 75th, or even the odd 220th. You might even check for special editions printed by a newspaper on its own anniversary.