- Can you swim, Dickey, me boy?
- No.
- Well, I'm the best swimmer in the world. Once I swam the English Channel with an anvil on me chest.

13 seconds sound clip from the She Wore a Yellow Ribbon movie soundboard.

You can hear this line at 01:03:55.175 in the Blu-ray version of the movie.

Quote context

[...]

- Mr. Cohill, you will be in command. You'll take two squads, cover our crossing.

- Deny the hostiles the use of this ford.

- First squad!

- Second squad!

- The second squad has too many old married men.

- First squad! Fifth squad! Wheel out, form on the right!

- Can you swim, Dickey, me boy?

- No.

- Well, I'm the best swimmer in the world. Once I swam the English Channel with an anvil on me chest.

- You know, I've got... I've got two jars of Damson plums on my pantry shelf. They're just waiting to be eaten up by a little girl like you.

- Tell her about the boat.

- Oh, Captain Brittles. Request permission to remain behind with the rearguard, sir.

- Permission refused.

[...]