I expect that the armament layout for the "Perfection" armored cruiser was similar to one of my two photos

I don't believe that John Robert's description of the "Perfection" armored cruiser concept for 1902 explicitly described the armament layout. He just indicated that the layout allowed for 10-gun fire forward, presumably as well on the broadside and aft. In reality, it would only be a paper capability, due to blast effects. The layout in Dr. Oscar Parkes' book British Battleships is for a flush-decked ship with two 7.5in twin turrets, side-by-side on the forecastle and the quarterdeck. Amidships, one level above the weather deck, are twin turrets on each side. Also at that level, in the superfiring position are twin 9.2in turrets, forward and aft. The alternative arrangement is with three 7.5in turrets on each side, with the center turret superfiring. Forward and aft are the 9.2in turrets. My photo shows a raised forecastle with the latter arrangement, while the former has a flush deck, as in Dr. Parkes' drawing.