I think my favorite postcards of Uptown are those with people. They're not too common. Most show buildings, or crowds at a distance. There are very few where you can actually make out individual faces.Wilson Avenue Beach was located at 4600 North, and was a privately owned beach. In 1915, the City of Chicago opened Clarendon Beach (now Montrose Avenue Beach) immediately to the south, at 4400 North, to serve as a public beach.
Click on the thumbnail photo below to see a larger version of the black and white image of Wilson Avenue Beach, housed at the Library of Congress.