Geographical distribution, Lyell on, [65];

Wallace on, [146]

Geological Society, foundation of, [25];

early history, [26];

connexion of Lyell with, [44], [71]:

of Darwin, [100], [105]:

of Scrope, [50];

discussions on rival doctrines at, [24], [25], [29], [30], [60], [76], [77], [105]

Geology, Darwin's interest in, [96], [99], [124], [147], [158]

Gibbon, his influence on Lyell, [52], [67]