When the guide worked the combination, he unwittingly gave the secret spring one press too many.

Duncan went to the fireplace and pushed the secret spring.

There's no secret spring, nothing that will be turned or manipulated.

Soon enough his fingers happened on the secret spring.

They fed some secret spring of delight in her being.

Suddenly he touched a secret spring even though his touch was blundering.

A secret spring of joy, it might have been!

A secret spring in one of the steps must lead to a passage, another staircase, or a hidden trap.

Striding to the wall of the basement room, he pressed a secret spring.

Step by step they mounted, the farmer first, since he knew where to find the secret spring.