Guys, thanks for all your kind comments. I know the purists would consider me some sort of heretic for having the old Marlin restored, but I would never, ever consider selling it. Now it's back in like-new condition - action is smooth as silk, it shoots straight as an arrow - hopefully, it will be passed down & used for another 100+ years to come by future family members.
It really is like having a living piece of family history in the house.
By the way, I forgot to mention in my original post, the other Marlin - Model 60 .22 - is also a family heirloom. My wife inherited it from her grandfather.