under plain cover การใช้

• Material was sent to their homes under plain cover as correspondence marked " personal " carried no departmental identification or reference.
• Typescripts were delivered by hand under plain cover to'Oscar Wilde 10 / 11 St . James's Place '.
• Miller's first experience of directing a stage-play was for John Osborne, whose " Under Plain Cover " he directed in 1962.
• Osborne followed " The Entertainer " with " The World of Paul Slickey " ( 1959 ) a musical that satirizes the tabloid press, the unusual television documentary play " A Subject of Scandal and Concern " ( 1960 ), and the double bill " Plays for England ", comprising " The Blood of the Bambergs " and " Under Plain Covers " ( 1962 ).