I know, but most of these stories, including this one, are clearly set after the late 17th century (minus gunpowder, found in European weaponry by the late 15th-early 16th century), by which time the use of leaf springs had become common place, resulting in more people traveling by carriage rather than horseback.
Most of these stories are so anachronistic you can't really set them at a specific time period. If I see some kind of year, it tends to be in the range of 950-1600, which usually indicates where the author wants the story to take place in.
Fashion in particular varies a lot, sometimes even having clothes from post-industrialism eras. Weaponry and armour can be anything, like rapiers crossing with spathas, and that's if they're not pure fantasy anyway. Castles and fortifications are usually medieval (which is a long time span just by itself), sometimes with classical flavours. Mansions can sometimes be later, while more common buildings are earlier.
So all in all, I don't think you can say it's clearly set in any era. Most of the time.
And yeah, gunpowder is usually excluded, despite being available even as early as the late 14th century. It sure took a few centuries to make armour "obsolete".