Original WWI era MP grouping from the same soldier, Ralph A. Grenfell.  He was an MP with the 2nd MP co., AEF.  He is listed in his pay book as being a traffic director.  Enlisted Dec. 1913.  Included are the pay book with sleeve; MP AEF instruction manual; MP armband, soldier's French phrase book, and a VFW 1927 convention award.