Brick by Chance and Fortune: a documentary about the bricks in St. Louis, their varieties, the theft problem, and how to identify the era your home was built based on the brick style! Watch the preview here:
Spotted in a sidewalk on Milenz in south city, St. Louis
From Bob Corbett's personal brick collection.
http://faculty.webster.edu/corbetre/dogtown/history/brick-collection.html
For an extensive look into the geology of the clay mines:
Where did all this clay come from? The name Cheltenham has come up a few times- the neighborhoods that are now Dogtown and Clayton/Tamm- and that is what the extensive clay deposit beneath those neighborhoods and more was named after. For an extensive list of terms, locations, thicknesses, and mine locations visit: http://www.romeofthewest.com/2009/05/clay-mines-of-saint-louis.html