Later, Number Six notices a woman covertly observing Cobb's funeral from a distance.

While waiting, visit the imperial council chambers, where the viziers held session with the sultan observing covertly from a screened window on the second floor.

"I wish I knew your game," Xar said to himself, pretending once more to peruse the child's book, covertly observing the lazar.

These garments, based on the isolation suits worn by Federation social scientists while covertly observing prewarp species, were utterly black on the surface.

The major league commissioner's office sends "compliance personnel" to ball parks to observe covertly the appearance of players' mouths.

Jamie started to covertly observe his resurrected sister, allowing her to catch occasional glimpses of him.

That left Arvid free to covertly observe the aliens.

She looked at Mrs Alderley as she spoke, and realised that lady was covertly observing her.

If this is a FleetEx and nothing else, we observe covertly.

They set up in the attached house next door, using sensing devices to covertly observe Helga, Mac and their captives through the wall.