A lot of glass waxing of the dusty windows of history when police procedure is applied to historic crimes. Hospitalized Grant of Scotland Yard digs into the tale of Richard III and the princes of the Tower and comes up with some reversals of accepted facts. With the aid of a young American researcher, he goes back to contemporary accounts of the Tudor era, pieces personalities together and events form a different pattern. Highbrow sleuthing, perhaps, but fascinating to those nearer to history than the average mystery hound.