A Collector's Guide to 1898 Documentary Printed Precancels, the Non-Fullerton Cancels: The Possible Proprietary Cancel of Charles E. Cornell

Charles E. Cornell was a manufacturer of products that required the payment of proprietary taxes during the 1898 tax period, including cosmetic soaps and other skin products.  His printed precancel is known on the five eighths cent proprietary, and a similar cancel is also known on the half cent documentary.  The question is whether or not the half cent stamp below is that of Mr. Cornell.  It appears to be printed, but it also might be a handstamp.  This cancel belongs in a category of cancels requiring further proof or documentation.