A bit of random research has revealed that Fisher was commissioned to make two plaques for the Lusitania. See the atteched newspaper article. The Lusitania was sunk in 1915 quite probably taking the plaques with it, though just possibly they would have been removed on the ship’s conversion to a merchant ship for the war effort. I think you can see one of the plaques in the main lounge of the Lusitania in the attached image. The frame of the picture looks like Fisher’s work and I am guessing the figure is rising from the sea and hence the title “Theconquest of the sea”.