It looks as if the ferry has just docked and the passengers are walking up the street past Gibson Brothers' Tobacco shop.
Brian from The Paper Sponge kindly sent me this card, because he knows I love street scenes like this. They really are a slice of life, showing what people wore, the cars they drove, and what sorts of businesses were in a town. This one is especially nice, because it's a street scene in Canada, but also shows the skyline of Detroit, Michigan across the river.
If you would like to look at (or download) some great old postcard images of Windsor and nearby places, visit the
Southern Ontario Image Archive. And, be sure to check out Brian's website,
The Paper Sponge; he features postcards and all sorts of other interesting ephemera. Here's the back of the card, which shows that it was printed by the famous Valentine & Sons.