Hello everyone tonight

Thanks to both of you --good conversation--

I am not an authority on glass, but I had thought that production of crude glass had not been tried yet in the 1400's, you have verified that for me--thanks--

So then Ken all window or air passages were closed by wooden shutters of some type or another, and no doubt lead to very uncomfortable living quarters early on in the cold weather areas especially.

How did they overcome some of these problems, I am sure they must have developed alternative measures to deal with inclement weather--I do suspect that the light from the open hearths probably substituted for natural light somewhat, would you care to comment