- Sarge, we've got a lead.
- This was pushed through my letterbox this morning.
- What was?

6 seconds sound clip from the Carry On Screaming! movie soundboard.

You can hear this line at 00:28:24 in the Blu-ray version of the movie.

Quote context

[...]

- Are you saying that... this finger's come off something that's been dead for 500 years?

- No doubt about it. Dead as a doornail.

- Doc, you must be wrong.

- That finger came off something that was alive last night anyway.

- We can very soon prove it. We can prove whether it was living membrane by giving it a very strong electrical charge.

- Well, you do that, will you?

- Sarge, we've got a lead.

- This was pushed through my letterbox this morning.

- What was?

- Dear Sir, if you want to know what happened to Doris Mann, I can tell you.

- I am the cloakroom attendant at the one by the park, and you can see me any time at my convenience.

- Let me see that.

- Is it genuine, sarge?

- I don't know. It's unusual notepaper... perforated at both ends. Could be! Come on.

- They've just come out.

- Let's follow and see what they're up to.

- Good idea.

[...]