What has the author William McKendree Prottsman written?

While there is a person named William McKendree Prottsman, there is no record of him being an author. It's possible he has written something but it hasn't been published or is not readily available online.

To get more information, you could:

* Check online databases: Search for his name on WorldCat, Google Scholar, or other online library catalogs.

* Contact a local library or archive: They may have information on local authors or publications.

* Try a reverse name search: Use a website like Pipl or Spokeo to see if there's any information about William McKendree Prottsman that might reveal if he's an author.

Without more information, it's difficult to say for sure if he has written anything.