But most of the intelligence work on China is secret.

It was a type of operation relatively common in international intelligence work.

You see, intelligence work was almost a religion with him.

They started over by hiring new people with no background in intelligence work.

The man had a sixth sense when it came to intelligence work.

It was bad enough to have too few people to deal with normal intelligence work.

On the other hand, one of the reasons Friday had gone into intelligence work was for the challenge.

At this time, he became involved in intelligence work again.

He may have been involved in some kind of intelligence work.

He would tell them it was prison or a few years in intelligence work.