@AutumninNewEngland, this is a great idea!
I've attached new pictures for that tone taken hopefully at the right angle straight from the top. The second and third pictures show how it looks like.
I read online that if you can see the text from the window, it means that the window is too large. Is this a good way to gauge so? As seen in my first picture.
In you second set of pictures, the 1st and 3rd are taken at an angle. Not a good way to judge window. You see a good sized tilt window. 2nd picture is the straightest. Possibly the tiniest of window but I still say it's not windowed because if I look hard, I can see the steps all the way down to the keel.
Best setting is something with a busy under-gallery.
I'll second what everyone else is saying. It's a small window. It becomes bigger when you rotate the stone, but that's a tilt window and you can't really do anything about it.
The actual window is small enough that you may find it doesn't really bother you. The way to deal with it is usually to have metal under the stone. You can have an intricate gallery for example, or set it cathedral-style, that type of thing. If there's metal under the stone, it will reflect the light back to your eyes, effectively closing the window.