(Actually, the overhead coverage did have some help on the missile gap issue from human spies.)

Each country bases its view on a combination of satellite imagery, human spies and electronic eavesdropping.

Has the use of space satellites, listening devices, and other advanced technology reduced the importance of the human foreign spy?

There is loose in Lankhmar Below a human spy, magically changed to our size.

The human spy is impersonating him in Grig's own clothes!

Secret intelligence-gathering, from advanced technology to a human spy in a foreign capital, is indispensable.

Did they have human spies working for them?

Are there spies, human or otherwise, anywhere in sight of our walls?

"I believe that the human spies have joined forces with the deserters," he told Ubinew.

He wasn't going to leave the sword behind on the knoll where it might entice the Ersa or a human spy.