They must have pulled up somewhere.

And runs into the grotto in order to rem… Don't you see how my little son Jan is a… Bill is supposed to have him for the sum… Oh, and Monsieur Poirot, please don't te… And we caught him today, didn't we, Nort… Where's your friend? You are very welcome to the Bureau of Pr… We plan for you to remain in Soviet Russ… I've got a point, Poirot, which will scu… Bill seems very nice, and Chilts needs s… That's very thoughtful of you. No, I mean I confess. Maybe it was a rat. I couldn't believe it really worked. God, what will they think of next?