close watch

See: prudence
References in classic literature ?
What we can do is simply to concentrate all our available strength, keep a close watch on the enemy, and obtain reinforcements.
These preparations were concluded about five o'clock in the evening, while sentinels kept close watch around the island, and the boats of the Resolute patrolled the channel.
If ever adventure was well damned, it was by Sheldon, sweating in the windless grass and fighting gnats, the while he kept close watch up and down the avenue.
Keep a close watch on them therefore; and dispatch one of your comrades, the lightest of foot, to bring the news of the yeomen thereabout.
A close watch had to be kept upon all the poor remnants and fragments, to prevent embezzlement.
We depend upon you, you know, to keep a close watch upon him.
Ay, marry," said Prior Vincent, smacking his lips after a deep draught of wine, "I have kept a close watch upon him, albeit he was unawares of the same, and I know right well that he hath no money to pay me withal.
As the voting began in Watsonville, pickers briefly left oceanside fields laden with fat red strawberries to place their ballots under the close watch of Agricultural Labor Relations Board staffers.
Brokers said they expect bond prices to move in a volatile manner Thursday, with investors keeping a close watch on the movement in the stock market.
Graham's activity is certain to alert Arsenal, Newcastle and Glasgow Rangers, who have all been keeping a close watch.
The measure, which has yet to clear the Legislature's two houses, would also encourage irresponsible owners to keep close watch over their pets to avoid paying a fine if their pet was picked up by animal authorities.