Book excerpt: In this expanded edition of Randall Jarrell's letters, his widow, Mary, has added letters from Jarrell to Peter Taylor, publication of which was withheld during Taylor's lifetime. Taylor was, along with Robert Lowell, Jarrell's oldest and closest friend, and the inclusion of these incomparable letters adds another dimension of friendship, artistry, and intellect to a collection already noted for its behind-the-scenes glimpse of twentieth-century American literary history in the making.