edition of his "Researches into the Physical History of Mankind" (1826), he
certainly talks evolution and anticipates Prof. Weismann in denying the
transmission of acquired characters. He is, however, sadly self-
contradictory and his evolutionism weakens in subsequent editions--the only
ones that Darwin saw. Prof. Poulton finds in Prichard's work a recognition
of the operation of Natural Selection. "After enquiring how it is that
'these varieties are developed and preserved in connection with particular
climates and differences of local situation,' he gives the following very
significant answer: 'One cause which tends to maintain this relation is
obvious. Individuals and families, and even whole colonies, perish and
disappear in climates for which they are, by peculiarity of constitution,
not adapted. Of this fact proofs have been already mentioned.'" Mr
Francis Darwin and Prof. A.C. Seward discuss Prichard's "anticipations" in
"More Letters of Charles Darwin", Vol. I. page 43, and come to the
conclusion that the evolutionary passages are entirely neutralised by
others of an opposite trend. There is the same difficulty with Buffon.

Hints of the idea of Natural Selection have been detected elsewhere. James
Watt (See Prof. Patrick Geddes's article "Variation and Selection",
"Encyclopaedia Britannica (9th edition) 1888.), for instance, has been
reported as one of the anticipators (1851). But we need not prolong the
inquiry further, since Darwin did not know of any anticipations until after
he had published the immortal work of 1859, and since none of those who got
hold of the idea made any use of it. What Darwin did was to follow the
clue which Malthus gave him, to realise, first by genius and afterwards by
patience, how the complex and subtle struggle for existence works out a
natural selection of those organisms which vary in the direction of fitter
adaptation to the conditions of their life. So much success attended his
application of the Selection-formula that for a time he regarded Natural
Selection as almost the sole factor in evolution, variations being pre-