a paper-office
Note from 'Mr Bickerstaff's Correspondents' by Richard Steele

As George A. Aitken pointed out in a footnote to this essay,

"This idea was carried out in 1725, when Charles Lillie published, by Steele's permission, two volumes of 'Original and genuine Letters sent to the Tatler and Spectator, during the time those works were publishing. None of which have before been printed.'"