I know it sounds a bit complicated, but if you keep to the right, you can't go wrong.
7 seconds sound clip from the A Chump at Oxford (1939) movie soundboard.
You can hear this line at 00:23:18 in the DVD version of the movie.
Quote context
[...]
- Well, you see that entrance in the hedge over there?
- Yes.
- Then, after you've been to the right, you keep going right until the left turn again.
- Then you go right again until you find yourself left on the right side.
- I know it sounds a bit complicated, but if you keep to the right, you can't go wrong.
- Is that to the right or the left?
- My dear old thing, it makes no difference.
- Now, let me get this straight, we go to the left when we... after the...
- I have the directions clearly in my mind.
[...]