Then they ordered something to eat, and while they were eating, they talked a lot about, er... Oh, about the Thirty-Nine Steps.
8 seconds sound clip from the The 39 Steps (1937) classic radio play.
You can hear this line at 00:45:48 in the radio play.
Quote context
[...]
- Well, something happened last night that convinced me you've been telling the truth.
- May I ask what earthquake caused your mind to work at last?
- No, I hid behind the counter.
- They asked the innkeeper about us.
- Oh, don't ask me what it means, because I don't know.
- Well, they said the Professor was clearing out of the country.
- Did they say how soon he was leaving?
- No. But they did say that he was going to London first to pick up someone at a music hall.
- Thirty-Nine Steps... London music hall... It doesn't make any sense.
- Which room are these men in?
- When?
- Oh, about four or five hours ago.
[...]