How could Holland & Holland build their own guns prior to the 1890's, they didn't even have a factory before then. I have Cogswell & Harrison's book and I'll check to see but I believe they were a maker of best guns for other firms. My custom rifle, triggers by L&R, lock by Chambers, barrel by Rice, assembled by (?), its all the same today for custom high end rifles and shotguns isn't it??