Dunbar Popcorn Wagon mounted on a Ford Model T with a Smith Form-a-Truck Conversion and a Wilbur Beard Engine 
Please help identify the Wilbur Beard Engine?

Picture
Page from Dunbar's Sales Book. The first column lists the steam engine's number that was placed in the wagons. Note they list it had a Wilbur Beard Engine. The sales receipts for this period of time have been lost.

Letter to Dunbar & Co from an owner of the above Dunbar Popcorn Wagon

Letter from Dunbar Manufacturing to owner of the above Dunbar Popcorn Wagon.