G.K. Chesterton: The Apostle of Common Sense2000

Father Brown:
I can't seem to find where I put it.

Porter:
Put what?

Father Brown:
Oh that piece of paper. The one that tells me where I'm going. One of those confounded details.

Porter:
The devil's in the details, Father.

Father Brown:
[finding it] Here it is! Glengyle Castle.

Porter:
That place? Heaven help you - the devil is in that detail, sure enough.

Father Brown:
What do you mean by that?

Porter:
I mean the devil, Father.