Chesterton was reacting spontaneously to the words of Jackson, a friendly adversary and a socialist.

"Chairwoman Brown has a great talent for press coverage," he said, saying she had been "a friendly adversary" for more than 20 years.

Ron sard was an adversary, however friendly and charming he might be.

He'd have to treat her like a friendly adversary and use whatever limited wiles he had at his disposal to find out her place in all this.

We are old friendly adversaries.

The Dark Lady is a very ancient and friendly adversary, and she can care for her own.

Again, the atmosphere is friendly with everyone recounting the day's activities whilst making new friends and meeting old adversaries.

Allegedly, there she remained undetected while still recording many of her friendly adversaries, attracting interest from the participating countries.

Eventually, Sue Ann and Mary became somewhat friendly, or perhaps were friendly adversaries.

And what did he mean by "friendly adversaries"?