Dracula by Bram Stoker Chapter 15 Page 33

Then Arthur spoke out, “Dr. Van Helsing, I don't quite like to `buy a pig in a poke', as they say in Scotland, and if it be anything in which my honour as a gentleman or my faith as a Christian is concerned, I cannot make such a promise. If you can assure me that what you intend does not violate either of these two, then I give my consent at once, though for the life of me, I cannot understand what you are driving at.”

“I accept your limitation,” said Van Helsing, “and all I ask of you is that if you feel it necessary to condemn any act of mine, you will first consider it well and be satisfied that it does not violate your reservations.”

“Agreed!” said Arthur. “That is only fair. And now that the pourparlers are over, may I ask what it is we are to do?”