But despite her feelings, Jill kept her vigilant watch, day after day, often long into the night.

Project SeaWolf kept a vigilant watch on the water.

And the rest of us, especially the media, would have to keep vigilant watch, so we could sound the alarm before an irrevocable pardon is granted.

Keep a vigilant watch for this dangerous alien!

Thus was created the Dark Border over which the Hasturs maintained an ever vigilant watch.

Security officers throughout the hall kept vigilant watch.

During the first week a vigilant watch was maintained night and day.

Then, satisfied that they would all recover, he set to his vigilant watch.

Frank, solicitous for the little fellow's safety, kept vigilant watch over him for some days, but no violence was attempted.

"We shall keep a vigilant watch to right and left as we go."