On this week’s edition of All Over The Map for Seattle’s Morning News, we visited a pocket park on Mercer Island along the shores of Lake Washington. It was here where a "rich and creamy" reminder of the island’s history was recently discovered by a pair of divers.

Franklin Landing is a tiny street-end park on the west side of Mercer Island, essentially opposite Seward Park over on the Seattle side of Lake Washington. A dock at this location was a key piece of the "Mosquito Fleet" transportation infrastructure from the late 19th century to 1940, when the first Lake Washington Floating Bridge (which crossed Mercer Island) opened to vehicle traffic.

KIRO Newsradio was joined early Friday by Matt McCauley. He’s known to many as "Mr. Lake Washington History;" McCauley is an author, historian, underwater explorer and a good friend of Seattle’s Morning News.