Possible Clues:

• Hinged windows
• That's their lookout for such as Roger
• Concretes around as the holes for them in the walls
• Windows with vertical hinges
• Window frames
• Roger for one may be seen through
• One may see through such as Sir Roger
• Windows which open on vertical hinges
• In court they may start to be open and shut, as in Roger's, for one
• One might have a look through what Roger was one of