Here's a lovely blog consisting simply of old photos, advertisements, paintings, and such: Turn of the Century. Pictured below: two of my favorites; at left, The Garden Portrait (c.1910), at right, "His Name Is Ben": The Portrait of a Coyote (1909). There are tons and tons more where that came from. NOTE: the way you navigate between pages on the Turn of the Century blog is clever but may be unfamiliar to some folks; just click the huge black-and-gray arrows on the left edge of the browser window to navigate between pages of photos.
Now stop working and go enjoy zillions more Turn of the Century images.
(Via Tweets of Old.)