A BRONZE PLACQUE

AT THE LONDON GUARANTEE

A well crafted bronze placque spans the entrance of the London Guarantee Building at 360 North Michigan Avenue.  On the left there is a highly stylized Native American of some significant stature.  In the center: Fort Dearborn.  To the right, a boy-next-door in buckskin completes the composition.
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The contrasting vision goes well beyond facial features.  The settler's weapons are specific:  two hand pistols, a rifle, and a powder horn.  The Indian holds a container of feathers, that I would assume, are arrows. And a shield.

Is this the work of two sculptors (neither credited) working in disparate styles?  Or one, making a cultural statement at the corner of Michigan and Wacker in 1922? (Click on Images to see more)