Additional response, at length, to CL’s criticisms of natural selection. Comments on failure of rodents to develop in Australia. Argues that most species become extinct and do not develop. Discusses variability, especially variability of rudimentary organs. Extinction among ammonites. Survival of Ornithorhynchus. Descent of marsupials and placentals. Emphasises embryological argument for descent of species.

No summary available.

Thanks for the newspaper cutting repudiating his wisdom on weather matters. Has had erroneous charges laid at his own door. What arms has he taken?

Thanks for his letter, but regrets he should have misconstrued the reason for his suggestions. Has no commercial motives.