Sir Arthur Thomas Quiller-Couch (1863-1944) was a writer, literary critic, and academic who sometimes published under the pseudonym 'Q'. He was educated at Trinity College, Oxford where he later became a lecturer.
One of his major achievements was to edit the Oxford Book of English Verse (1250-1900) the first edition of which sold half a million copies.
He is also the subject of a book entitled 'Q''s Legacy by Helene Hanff (author of 84 Charing Cross Road), in which she documents the influence that Quiller-Couch had on her literary life.
The book The Art of Writing (1916), from which Woolf quotes, consists of a collection of essays given by Quiller-Couch at the University of Cambridge during 1913-14.