A bit further inside the massive building shoppers found Food Mart, where their groceries were boxed and slid down rollers to be collected outside at street level. For many New Bedford residents, the memory of Mars Bargainland is still vivid, but few…

The building was five stories tall, of rough-hewn local granite, and about as long as the distance between streets in the older whaling center of town. A steam engine designed and built by Providence’s George H. Corliss powered ten thousand…