Approximately 20 years ago (perhaps longer), I legally purchased a handgun from a gun shop near Annapolis solely for home defense . I went thru the usual processes etc. but now I'm unable to find any paper work. I know what is said about "leaving sleeping dogs rest" but I'm contemplating transporting the gun (locked in a safe without ammunition etc.) to a second residence in PA. Naturally, any paperwork would come in handy should I be stopped by law enforcement etc. Anyone have any ideas how I might proceed with this matter.