work in Auvergne, [35];

in Italy, [35];

delay in publishing, [35];

work on volcanoes, [36];

his just views on Evolution, [37]-[39];

cause of want of recognition of his work, [39], [40];

devotion to politics, [40];

reviews of Principles, [41], [61];

correspondence with and influence on Lyell, [50], [61];

his differences of opinion from Lyell, [62], [63], [151];