review of Scrope's book on Auvergne, [56];

visit to Auvergne with Murchison, [56];

advocacy of travel for geologists, [56];

journeys in Italy, [58];

Lyell on Murchison, [57];

Murchison on Lyell, [58];

Lyell's avoidance of controversy, [63];

differences of opinion with Scrope, [62], [63];

attention to literary style, [65];

professorship at King's College, London, [65], [69];