OK, I'm passing this on second hand from a friend who's a pretty successful writer.
He said you can't take anything seriously that agents and publishers tell you. He mentioned an agent telling him nobody wants to buy series with the same hero anymore.
What he said was, "When they say nobody wants vampire detectives or stories set in Norway or whatever, what they're really saying is that nobody told them it was OK and they don't have the ability to make the decision on their own".
And this: think about it. Publishers telling an agent there is no market for something? What does that mean? They are either interested or they're not. That's what they can say that makes sense: I'll buy it, or not.
Thanks, Steve. Sounds like a great story you have there. Best of luck.
I love period mysteries.
I hope you find a publisher... I'd love to read it.