If you look at the base of the city hall feature in the image there is a fairly obvious set of eyes. They look animal, are located in the darker space with the much lighter space coming down between the set of eyes…honestly reminds me of a badger.
Next to the mill stone is an object most call the "locust". In my opinion that is actually a human kidney, drawn like you'd find in an anatomy textbook. Erastus B. Wolcott has been credited with the 1st ever successful removal of a diseased kidney.
The "fair folk" category match for Milwaukee is Mugwumps. Notice the teeth in the lower right portion of Mugwumps jaw. They spell “WI” the abbreviation for Wisconsin. Next look at Mugwumps left side of the mouth and you will see the horse leg and hoof. This is a clear hint to the Erastus B. Wolcott statue. There is also the "pretzel gavel" on page 146. Pretzels are of German origin and Milwaukee has deep German roots. The base of the Wolcott statue was designed by Albert Ross. Ross also happens to be the same person who constructed the Milwaukee County Courthouse, so that gavel makes a whole lot of sense.
The "southern foot" would be the front right hoof of Gunpowder, Wolcott's horse. If you look at the statue today the whole front half of the statue is surrounded by brick paver stones. Generally these stones aren’t set into the ground very deep, but they are impeding recovery of the casque. Any idea how long those brick paver stones have been there? If they pre-date the early 1980s it would point to the casque being at the rear right side, but my understanding is the rear portion of the Wolcott statue has been dug up extensively over the years.