by Dial, $9.95. Mr. Ferris is skeptical of gaudy legend, appreciative of Thomas’s unquestionable poetic accomplishment, and a bloodhound in the pursuit of fact. This combination makes for a fine biographer, and Mr. Ferris has indeed produced a fine, fair-minded, beautifully written life of a man who deserves it. Thomas has been subjected in the past to a good deal of sentimental exaggeration. Photographs, notes, bibliography, index..