I already have. It works

Willie:
This is the dirt from the compound. Danny:
This is from the tunnel. [Mac takes a handful of tunnel dirt and sprinkles it onto the mound from the compound] MacDonald:
Wherever we put it, they're going to spot it a mile away. Willie:
Well, maybe we could put it under the huts. The dirt's dark there. MacDonald:
Nah. No, it's the first place the ferrets would look. I saw one measuring the height under a hut yesterday. Willie:
Well, maybe we could dry it out the same color. Danny:
We'll have fifty tons of it. Willie:
Well, I was just thinking out loud. Bartlett:
If you must think, for God's sake, think clearly. Where the devil is Ashley-Pitt? MacDonald:
We can't destroy the dirt, and We can't eat it. The only thing left to do is... camouflage it. That's as far as my thinking takes me. [Ashley-Pitt enters] Bartlett:
Didn't they teach you promptness in the R.N.? Ashley-Pitt:
You'll never believe it, but I think I have the solution. The problem is somehow to get rid of this tunnel dirt over the compound. Bartlett:
Well, of course. Ashley-Pitt:
Would you mind? [Eric hands Danny and Willie a blanket, which they set on the floor, while Eric gets his contraption ready] Ashley-Pitt:
Now... you fill these bags with the dirt from the tunnel. Then, wearing them *inside* your trousers, you wander out into the compound, where you pull these strings in your pockets. Out come the pins... [Eric pulls the pins out to demonstrate] Danny:
Eric, it's good. Ashley-Pitt:
All you have to do is... kick it in. Unless you're a complete fool, the ferrets will never see a thing. MacDonald:
It's indecently brilliant. What do you think, Roger? Bartlett:
We'll try it first thing tomorrow. Ashley-Pitt:
I already have. It works