The Opera Glasses of Viscount Graves

It has been a very long time since I last encountered the Opera Glasses of Viscount Barrington Graves.  Or has it?  When I first bought—and subsequently sold—them, they were nearly fresh from Professor Wrinkle's workshop, and a thing of beauty.  Green wood and polished brass, gleaming lenses and, as ever, turning gears and cogs and wheels, whose exact purpose eluded me entirely.  To be perfectly honest, there are times I wonder whether or not Wrinkle's engineering is not some unlikely form of magic (known to some as the Wrinkle Effect); for though my understanding of mechanics is quite limited, his contraptions have never seemed to make any logical sense.   I first acquired the Glasses after the untimely death of the the Viscount, who had ordered them made to compensate for a tragic case of nearsightedness which interfered, in his autumn years, with his enjoyment of Purcell.  It was only days after receiving them that he suffered a stroke during a performance of The Mountain Sylph, aft