Patents and the laws which regulate them are queer things to have to do with. No one who has not had personal experience of the complications that arise could believe how far these spread and how entangled they become. Great acuteness as well as caution is called for if you would guide your patent bark safely to port -- and perhaps more than anything, a power of holding your tongue. I was no chatterbox, nor, when on a mission of importance, did I go about looking as if I were bursting with secrets, which is, in my opinion, almost as dangerous as revealing them. No one, to meet me on the journeys which it often fell to my lot to undertake, would have guessed that I had anything on my mind but an easy-going young fellow's natural interest in his surroundings, though many a time I have stayed awake through a whole night of railway travel if at all doubtful about my fellow-passengers, or not dared to go to sleep in a hotel without a ready-loaded revolver by my pillow.

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