I knew now past all doubt that I was going back. I had to.

6 seconds sound clip from the Leiningen Versus the Ants (1948) classic radio play.

You can hear this line at 00:06:48 in the radio play.

Quote context

[...]

- Tomorrow noon? Still time.

- Still time?

- What do you mean, sir?

- Why, nothing.

- But what did I mean? Still time for what? For Leiningen to flee or still time for me to...?

- Even as I rejected the thought with horror, I knew that the fascination of that man was more than I could resist...

- Leiningen's fight was drawing me back toward that plantation - and death.

- I knew now past all doubt that I was going back. I had to.

- It was ten o'clock in the morning when I rounded the bend and saw Leiningen's plantation before me.

- I put in at the dock and tied up the launch.

- Then I saw him - standing on the bank above me, arms folded, stubby cigar in his mouth, and that same smug grin on his face.

- I made my way up to him.

- Back with another warning, Commissioner?

- No.

[...]