I see only one immediate difficulty, I know it by instinct rather than reason.

We shall all have to speak frankly.
And yet I fear that in some mysterious way poor Mrs.Harker's tongue is tied.

I know that she forms conclusions of her own, and from all that has been I can guess how brilliant and how true they must be.
But she will not, or cannot, give them utterance.

I have mentioned this to Van Helsing, and he and I are to talk it over when we are alone.

I suppose it is some of that horrid poison which has got into her veins beginning to work.