Where Have All the Colonial American Romances Gone?

I have two releases that qualify under this category, Through the Fire and Enemy of the King.  Daughter of the Wind is set shortly after the American Revolution so technically it's not colonial although it has that flavor.  And Red Bird's Song, release date 9-10-2010, is solidly colonial–the frontier, like in The Last of the Mohicans.

Eons ago colonial America used to be a popular romance theme.  I think the moment I started writing them, New York stopped publishing them so that nowadays few a...