But he is not letting any secrets slip before the big day.

What if one arranged to slip in just before that critical moment?

We can only hope the thing doesn't slip before men.

I helped him slip into the cab just before daylight.

Ronin He slipped into the empty building before anyone else.

The Master slipping out of the door sometime before dawn.

In fact, it was almost invariably one of the other cards that slipped quietly down before her.

He slipped out of the room before the end of the lesson.

Kirk turned, went to the door, and it slipped open before him.

She slipped forward a meter or so at a time, stopped, peered about, before the next advance.