A horse is a horse, of course, of course,
And no one can talk to a horse of course
That is, of course, unless the horse is the famous Mister Ed.
via an article about Joseph Greenhut in PEORIAmagazines.com: “Greenhutâ€™s mansion on High Street at Sheridan (today officially 802 Sheridan) once featured a tall tower, a turret, and a glassed conservatory. The carriage house, decorated with white-painted cast iron horse heads, testifies to the grandeur of the original red brick architecture of the house.”
The only other reference to the Carriage House I could find is contained in the paperback Peoria – A Postcard History, which states that it was built in 1886, two years after the completion of the Greenhut Mansion.
Thanks to Mitch Mitchell and to all who commented.