Read it through once

“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.”