An interesting discovery, and an even more interesting re-discovery....

The Sun, New York, “Judge Collins called his attention to the fact that the constitution of the United States gave citizens the right to bear arms”, June 28, 1891

The following U.S. Supreme Court case delves into the right of self-defense of employees while working for their employers: 

New Orleans & N. E. R. Co.. v. Jopes, U.S. Supreme Court, “He has not forfeited his right of self-defense by assuming service with a common carrier; nor does the common carrier engage aught against the exercise of that right by his employe”, Dec. 7, 1891