JONES SAYS LBJ IS OUT AT DINNER, OFFERS TO LOCATE HIM; HHH SAYS THAT IS NOT NECESSARY; JONES SAYS LBJ LIKED HHH'S SPEECH LAST NIGHT; HHH SAYS HE HAS TALKED WITH JOHN CRISWELL, ASKS JONES TO RELAY HHH'S AND MUSKIE'S GREETINGS; PRESS COVERAGE OF CONVENTION