"--A.R.W.
[44] "June 8, 1864."--A.R.W.
[45] "Referring to my broken engagement."--A.R.W.
[46] Paper on the three forms of Lythrum.
[47] Probably the one on the Distribution of Malayan Butterflies, _Linn.
Soc. Trans._, xxv.
[48] E.B. Tylor's "Early History of Mankind," and Lecky's "Rationalism."
[49] "Prehistoric Times."
[50] The note speaks of the "characteristic unselfishness" with which
Wallace ascribed the theory of Natural Selection to Darwin.
[51] "Fuer Darwin."
[52] "On the Pigeons of the Malay Archipelago," _Ibis_, October, 1865.
Wallace points out (p. 366) that "the most striking superabundance of
pigeons, as well as of parrots, is confined to the Australo-Malayan
sub-regions in which ... the forest-haunting and fruit-eating mammals,
such as monkeys and squirrels, are totally absent." He points out also
that monkeys are "exceedingly destructive to eggs and young
birds."--Note, "More Letters," i. 265.
[53] "The Geographical Distribution and Variability of the Malayan
Papilionidae," _Linn. Soc. Trans._, xxv.
[54] The passage referred to in this letter as needing farther
explanation is the following: "The last six cases of mimicry are
especially instructive, because they seem to indicate one of the
processes by which dimorphic forms have been produced.
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