Nevertheless, hateful as saying 'No' always is to an imaginative person, and certain as the offence may be that it will cause to individuals whose own work does not require isolated effort, the writer who is engaged on a book must learn to say it. He must say it consistently to all interrupters; to the numerous callers and correspondents who want him to speak, open bazaars, see them for 'only' ten minutes, attend literary parties, put people up, or read, correct and find publishers for semi-literate manuscripts by his personal friends.