The Fellowship of the Frog by Edgar Wallace

There is a cell in Gloucester Prison; the end cell in a long corridor of the old building. Next door is another cell, which is never occupied, for an excellent reason. That in which Ray Bennett sat was furnished more expensively than any other in the prison. There was an iron bedstead, a plain deal table, a comfortable Windsor chair and two other chairs, on one of which, night and day, sat a warder.

The walls were distempered pink. One big window, near the ceiling, heavily barred, covered with toughened opaque glass, admitted light, which was augmented all the time by an electric globe in the arched ceiling.