Complex sentence: In 1870, Bradley was elected Master of his old college at Oxford, and in August 1881 he was appointed Dean of Westminster in succession to Rev. Stanley, whose pupil and intimate friend he had been, and whose biographer he became.
Split into simpler sentences: In 1870, Bradley was elected Master of his old college at Oxford. In August 1881 he was appointed Dean of Westminster in succession to Rev. Stanley, whose pupil and intimate friend he had been, and whose biographer he became.