#11 Stan is correct; Holland & Holland .500/.450 3 1/4" Royal Hammerless non-ejector.

As Bill said, #16 AAH(E?) Parker is in a private collection. The location of #14 is unknown. #15 is at the Marine Corps Museum in Quantico, which also has his 26" 20g L.C. Smith with a Miller Single Trigger purchased after a serious riding accident 9-6-1921.

His Lindner Daly