Even his parents never found that secret cache of books or knew why he spent so much time in his own.

If it was a secret cache there wouldn't have been any records of it.

And no one knows how much more pain Iraq is willing to endure to hide its secret cache.

I happen to have a secret cache of the best chocolate in the galaxy.

"Is this a secret cache of supplies the city was trying to put together, without warning the community of a serious threat?"

He laid the gun on the table and went back to his secret cache.

The person knew where Bobby's secret cache was but didn't have the key to open it.

He was heading for a secret cache of food somewhere, Harry decided.

Or were they distracted by their secret cache of erotic stories?

But even if letters are available for research (perhaps a secret cache is discovered in an old house), they still have their limitations.