[MassHistPres] Historic door + privacy glass

[Marc Cleary]

I have a client in the South End, Boston
They have a typical original wood door with clear circle top pieces of glass
(2 of them).  They are looking to make them less transparent and to obscure
the view into the interior.
Does anyone know any options that would be historically correct and/or
approved?
Thanks for any help on this topic in advance.

Marc Cleary
Cleary and Son, Inc.
marc at clearyandson.com
www.clearywindowrestoration.com