Master Usher, I regret that I must say this, but it is my sad duty to inform you that your sister Madeline is no longer living.

12 seconds sound clip from the The Fall of the House of Usher (Escape) classic radio play.

You can hear this line at 00:11:56 in the radio play.

Quote context

[...]

- Then, one evening, we were sitting in the vaulted studio while the first shadows of night began to flow together into pools of darkness.

- He had been unusually troubled during the day and had been trying to find some solace by playing on the violin.

- Of a sudden, there came a knock upon the door.

- Stop it! Stop that infernal pounding, do you hear? Do you wish to drive me completely mad? Open the door and come in! Come in!

- It's the doctor.

- Well? What is it? What do you want?

- Master Usher, I regret that I must say this, but it is my sad duty to inform you that your sister Madeline is no longer living.

- Madeline, my sister? Then she's dead?

- She breathes no more.

- Dead?

(laughs hysterically)

- And, perhaps, my dear doctor, you can tell me what caused her death.

- Unfortunately, I can only take refuge in the term 'heart failure.'

[...]