About the best information I can help you with will be found in the 1981 Manning Centennial book.
Go to this web page and click on "Stores and Hatcheries 190 - 194" and then scroll down on the right side to the W.B. Parrott - Priebe & Sons write-up.
http://www.davidkusel.com/centennial/frame-y.htm

I would be interested in any pictures you dad might have from this business such as employees, etc.
If he would write down some names of people he remembers who worked there would also be nice to have.

Did you or any other of your family members go to Manning Schools?
We are presently working on a history of the Manning schools.