Couldn't figure it at first. I got up, lit the lamp and went to the window.

7 seconds sound clip from the Three Skeleton Key (Escape) classic radio play.

You can hear this line at 00:18:48 in the radio play.

Quote context

[...]

- Auguste joined in, too. Oh, very ingenious, Auguste.

- He learned that if he spread-eagled himself against the glass, they'd bunch and bundle against his figure. Then he'd leap back...

- Look! My portrait... in rats!

- It went on all day. And then... I was lying in bed. It was about midnight.

- I was very tired and I was just beginning to fall off to sleep when I became conscious of a new sound.

- Couldn't figure it at first. I got up, lit the lamp and went to the window.

- Even as I looked at it, I saw one of the panes begin to sag in.

- They had eaten the wood away!

- Louis! Louis! Come quick!

- What is it?

- They've found a way in.

- I held the glass with my hand. Now, they were all going crazy and, assured of the success of this maneuver, were all nibbling away at the wood.

[...]