There was a very interesting other feature in that movie. And that is that we decided to erect quite a large set, on location in a field, in the vicinity of the castle, which was sort of weather covered. It wasn't entirely suitable as weather cover because if it rained there very heavily you could hear the rain. But they erected what's called an air hall which is like a large tent held up by air pressure, by pressurised air... compressed air. And, they laid a floor in this field, a wooden floor, so we could track throughout the set, which is built in this air hall, which, as I say, was quite large. Usually used for certain sporting events and exhibitions and things. And I would say that was very successful. I don't know whether anybody else ever did that, either before or after. I haven't heard of it. But it was fully described in the American Cinematographer at the time, with pictures and everything. And the... the two art directors, which were a couple called Otto and Herta Pischinger, they built this very elaborate set of a villa, in this air hall, and it was... it had two if not three storeys.

There was a big sweeping staircase that went up and rooms at the top, or at least entrances to rooms at the top. On the ground floor there were three... there were four rooms and a hallway. And the idea of building that all in one piece was that there was a tracking shot planned in the... in the middle of the film somewhere there was a tracking shot where, in a bit of a temper, the countess, which is played by... who was played by Angela Lansbury, she sweeps through these rooms and she throws opens the doors, and then she goes to the next room and then she throws open some more doors and goes on. So it was built in order that there could be a continuous track. In the end, of course, the track wasn't completely continuous because, every time she throws open the door, you have to cut anyway because you cut... you can't go through a closed door and then see it opening. So, there had to be a cut there anyway.

It was an elaborate effort and one of the rooms was a dining room, and that had quite a low, carved ceiling, and because we were shooting in the ratio of 1.66, wide-screen... The problem about wide-screen is that if your... if you emphasise the wideness and you forget the fact that the wider you go, what is implied in that is a lack of height. It's wide but it's very low, as far as height is concerned. So without being able to dig a floor... dig a hole in the floor, I couldn't actually get the setup, a reasonable setup, that would show this wonderful ceiling. I'm afraid they never forgave me for that, but they should've known better, because they knew about the format. They had all these projections with angles drawn on pieces of paper, and they should've known that it was virtually impossible to get a setup that would show the ceiling. I think corners of it come in, but not the whole thing. But the work in the air hall was extremely successful, and, as I say, it provided a sort of weather cover. Except when you had heavy rain, then you could hear it splattering on the canvas.