Was there a company called Hireling Newspapers? Seems unlikely. I can find no record of it, and hireling always has been a derogatory word.
Why would a company call itself "Hireling Newspapers"?
If someone thought a newspaper was no better than a hireling, why would he/she/they have newspaper wrappers printed with "Hireling Newspapers" on them and spend money on those newspapers and postage to mail them to U.S. Senators?
The mind boggles.
Dr. Dane S. Claussen, Editor, Newspaper Research Journal