IX. Earth and Mars
1. THE SECOND MEN AT BAY
Such were the beings that invaded the earth when the Second Men were gathering their strength for a great venture in artificial evolution. The motives of the invasion were both economic and religious. The Martians sought water and vegetable matter; but they came also in a crusading spirit, to ‘liberate’ the terrestrial diamonds.
Conditions on the earth were very unfavourable to the invaders. Excessive gravitation troubled them less than might have been expected. Only in their most concentrated form did they find it oppressive. More harmful was the density of the terrestrial atmosphere, which constricted the tenuous animate cloudlets very painfully, hindering their vital processes, and deadening all their movements. In their native atmosphere t
