Cruise the Historic Potomac River Wilson Line 1961.  4 x 9 inch brochure that includes four panels of the same dimension printed on both sides.  The brochure highlights the Wilson Line's S.S.  Mount Vernon with two excursions each day from Washington, D.C.'s 4th Street Pier to Marshall (an amusement park in Maryland) and Mt. Vernon in Virginia.  The brochure includes a map, photos and descriptions of the destinations, sailing schedules, a photo and brief description of the S.S. Mount Vernon.  Ships carefully packaged