Book excerpt: When Sir Rupert Hart-Davis's magnificent edition of The Letters of Oscar Wilde was first published in 1962, Cyril Connolly called it "a must for everyone who is seriously interested in the history of English literature - or European morals." From this edition, long out of print, Hart-Davis has culled a representative sample of the letters from each period of Wilde's life, "giving preference," as he says in his Introduction, "to those of literary interest, to the most amusing, and to those that throw light on his life and work." The long letter to Lord Alfred Douglas, known as De Profundis is printed in its entirety.