Quiz Question

This evening, we attended a garden party where there was a quiz which included the question, "Which was the earliest novel published by Poul Anderson?" I was expected to get this right but didn't or at least not quite. I wrote Brain Wave although Vault Of The Ages also came into the back of my mind. In fact (see Significant Dates):

Vault Of The Ages, which is juvenile sf, was the first novel and the correct quiz answer;

Three Hearts And Three Lions was the first fantasy novel;

Brain Wave was the first adult sf novel;

Brain Wave and The Broken Sword were published in the same year.

That is a complicated situation as I hope you will agree. 

In the 1960's, the two sf scenarios were spaceships in the near or further future (the majority) or post-nuclear war recovery in the near future (the minority). Some works by Poul Anderson, e.g., his Psychotechnic History, combined these scenarios. Vault Of The Ages was post-nuclear war but a few centuries in the future. I do not remember much about it so maybe I should reread it if I can find it where it should be on a shelf upstairs but it is too late to look for it this evening.

Meanwhile, my rereading of Ian Fleming has brought me to a game of golf between James Bond and Auric Goldfinger.