Virginia Woolf was an English author, widely regarded as one of the foremost modernist literary figures of the twentieth century. Her most famous works include Mrs. Dalloway, To the Lighthouse, A Room of One's Own, and Orlando. 
In a 1928 letter to a mutual friend of T.S. Eliot, she writes:
"I have had a most shameful and distressing interview with dear Tom Eliot, who may be called dead to us all from this day forward. He has become an Anglo-Catholic believer in God and immortality, and goes to church. I was shocked. A corpse would seem to me more credible than he is. I mean, there’s something obscene in a living person sitting by the fire and believing in God." 
NOTE: There is a quote by Virginia Woolf which could easily be mistaken as further evidence of her atheism if not shown in its entirety.
"From this I reach what might be called a philosophy; at any rate it is a constant idea of mine; that behind the cotton wool is hidden a pattern; that we - I mean all human beings - are connected with this; that the whole world is a work of art; that we are parts of the work of art. Hamlet or a Beethoven quartet is the truth about this vast mass that we call the world. But there is no Shakespeare, there is no Beethoven; certainly and emphatically there is no God; we are the words; we are the music; we are the thing itself" (Moments of Being, pp. 72)