Thank you all...
1. I see that there is some dangerous load data on some sites.  Thank you for the warnings.  On over a 100 year old rifle, one needs to be very careful.
2. Thank you for the interpretation of the markings.  Maybe I should look for that Brophy book.
3. My brother never shot the rifle.  He had plans to before he started getting the horrible headaches.  I'll see him tomorrow...I'll ask him if he had a gunsmith look it over...there is a tag attached to it where it looks like he took it to a gunsmith...or was going to.
4. The number on the bolt (11806) doesn't match the number on the barrel/receiver (117602)...would they have matched originally?  It is strange that the bolt is a 5 digit # and the barrel/receiver is a 6 digit #.  Does anyone know why?
Thank you,
Todd