Amazing that you can even find some of these. I guess it's like everything else anymore, the world moves on and forgets much of the past...
Old Dan Tucker is funny, with a hillbilly feel to it! The second to an extent too. The last quartet really sounded like a barber shop quartet, they were good. It must take you some serious research finding some of these songs!
One of the first things I notice on these recordings is how quiet they are compared to today. The music is louder, obviously technology has much to do with it, but only to an extent. Things are just louder!