For what I can see from the image ,I would say the gun is by a Provincial gun maker or a gun that was bought in by the Birmingham gun trade then engraved with the name Samuel Ebrall of Shrewsbury ,Salop, UK 1845 to 1868 .The gun is a 13 bore with Birmingham proof marks and a gun number 1641
Hope this has been of some help a better image of the name would have helped
Feltwad