A lot of stuff, it turns out. Personally I would leave the prayer book and the sperm oil at home, but I would definitely bring my revolver and British pluck and grit. Would all of this fit in my Carradice Nelson saddlebag? I doubt it. I’d probably have to bring a fanny pack too.
Writers Without Money 
It does make a person wonder if they hauled a bicycle trailer. Interesting post.
Brigand: “Stop there cyclist. Your money or your life.”
Cyclist: (Draws out revolver and Union Jack): “Sir. It is only fair to warn you that I am armed, and British.”