Once inside you discover there are no buttons to select your floor.
The Enemy, once discovered, usually doesn't just roll over and go away without a fight.
Once discovered, she could never use it as a refuge again.
We once discovered a child receiving help from seven different people.
Once discovered, of course, the techniques for agriculture spread out slowly from the original center.
"Like all knowledge of value, it is not easy to discover, and once discovered, to understand."
The major houses often seize on these books, once discovered, to make them their own.
Once discovered, a survey was done to identify other states that had the disease.
Nobody has any idea whether the secret of the universe, once discovered, will be useful or even interesting.