- Would you spell it for a while?
- Certainly, Captain. And thank you.

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

You can hear this line at 00:47:33.027 in the Blu-ray version of the movie.

Quote context

[...]

- I've been finding that some lieutenant's bars are no guarantee of a gentleman.

- You're glad about Quayne, certainly. But only because it puts the happy ending to the stories you'll take back east to your tea parties.

- Well, now you can tell 'em you've seen it all. A real Indian fight, a man with an arrow sticking in his chest.

- That should make your tour just about perfect!

- Mrs. Allshard's having a rough time back there, Miss Dandridge. Chloroform and all.

- Would you spell it for a while?

- Certainly, Captain. And thank you.

- Did anyone ever take down your britches and tan your hide?

- Why, no, sir. That is, yes, sir. My father, sir, with a strap.

- Well, I'm just old enough to be your father, bub. Take the point!

- They'll make a fine, boisterous couple when they're married, Captain.

- Forward, ho!

[...]