Corgi, London, 1974, 1st pr thus.  ISBN 0-552-09638-5.  MMPB, 223 pages followed by Historical Note.  Wraps show edge and cover wear, some impressions, light reading creases on spine.  Book store stamp on verso of front wrap and another on blurb page; remainder of interior clean and unmarked with tanned pages.  ‘It was Blackstone’s job to find the mysterious saboteur who was trying to prevent the world’s first public steam locomotive railway from being completed.  The railway depended upon the navvies – men who laboured twelve hours or more a day constructing the tracks.  And if the navvies didn’t get paid – the railway didn’t get built.  So Blackstone had to discover who was behind the theft of the wages.  But, once accepted by the navvies as an ordinary working man,, Blackstone unearthed a plot to pull the world’s first Great Train Robbery.’ (from rear wrap)