Great Expectations by Charles Dickens Chapter 40 Page 22

pulling a greasy little clasped black Testament out of his pocket, “we'll have him on his oath.”

To state that my terrible patron carried this little black book about the world solely to swear people on in cases of emergency, would be to state what I never quite established; but this I can say, that I never knew him put it to any other use. The book itself had the appearance of having been stolen from some court of justice, and perhaps his knowledge of its antecedents, combined with his own experience in that wise, gave him a reliance on its powers as a sort of legal spell or charm.

On this first occasion of his producing it, I recalled how he had made me swear fidelity in the churchyard long ago, and how he had described himself last night as always swearing to his resolutions in his solitude.