Lady Bird's Landscapes-Landmark tour in Greyhound bus with Cabinet wives & press; Damfrey's Wayside Shelter dedication ceremony; planting a dogwood; Interstate 95 plantings and Highway One; visit to Monticello & heirs of Thomas Jefferson; Lady Bird mentions Jefferson's inventions, takes movies, lunches on terrace, gives speech, and tours University of VA; to Abingdon, TN, to Barter Theatre; ceremonies; Lady Bird stays at Martha Washington Inn & presents award to Roger Stevens; "Julius Caesar" play