Larry,
6830 is an "in the white" Alex Henry. It did have sidelocks at some time. Otherwise, the stock could not have been inlet and the gun could not have been proved. Somebody removed them and lost them. That's an expensive problem. Maybe your friend removed them for safety???
I do own AH #7064 which is a .450 express double rifle and is in the white. It's not engraved nor case colored, and the rib is not matted. It's proved however and it is complete.
Dickson's records shows it "in stock" in 1900 ( and never sold). It seems like a few of those are around.
Kirby Hoyt at Vintage Doubles also has (had?) a .360 double in the white. He might help you with pictures of the locks he has. And there are the guns shown in the double gun journal as described in the thread.
The other one does not look to me to be an Henry. The only Henry feature is the lightening machining in the action bar.
But that was not an exclusive Henry feature.
It would be great to rehabilitate both of them though.
Best regards,
WC
