CMPL presentation focuses on Mackinac summer cottages A couple of weeks before Memorial Day, the Clinton-Macomb Public Library hosted Mackinac Island’s Historic Summer Cottages, a presentation by Phil Porter. He spoke about the history and architecture of the island’s summer cottages. Photo by Alex Szwarc MACOMB TOWNSHIP — The unofficial start to summer is nearly here. For some, that means taking a trip up north, to the area where Michigan’s lower and upper peninsulas meet. A couple of weeks before Memorial Day, the Clinton-Macomb Public Library hosted a presentation by Phil Porter, director emeritus of Mackinac State Historic Parks, about Mackinac Island’s historic summer cottages.