'Local Boy' - I'm sure "BS" stands for Best of Springfield, Basement of Springfield, Brain Storming, or something like that. - LOL

Actually, I am jealous. I view your copy with notes and commentary, likely made by William Mook, as a great resource with valuable insights and factual corrections. You probably have the most valuable copy of Brophy's "Krag Rifle", out there!

What a neat 'Time Capsule'. It would be very interesting if you could photograph some of these notations and post them periodically on the KCA forum!