172 MAMMALS only be compared to the steady and rapid advance of an engine on a line of rail.’ According to Darwin, the elephant is reckoned the slowest breeder of all known animals. He says: ‘I have taken some pains to know its probable minimum rate of natural increase ; it will be under the mark to assume that it begins breeding when thirty years old, and goes on breeding till ninety years old, bringing forth three pair of young in this interval ; if this be so, at the end of the fifth century there would be alive fifteen million elephants, descended from the first pair. But the ivory-hunter and the sportsman are doing their best to render any increase at all impos- sible, and the African elephant is fast on the road to extinction. We have even recently an instance of one hunter killing seven elephants in five minutes. But Mr. Henry Bailey may as well tell the story for him- self. ‘The chief, he says, ‘pointed out an elephant resting against a tree close to the river. His colour so much. resembled that of the tree, and he was so immovable that for some time I could not make him out, until at length I spotted his great ear flapping backwards and forwards. Perceiving that it was a very unfavourable place for getting at them, I retired, crossed the river, and took up a position above them on the steep bank. At this spot I was within twenty yards of them, and could see all their heads and backs plainly. Selecting the bull with the largest tusks, 1 dropped him by a shot above the eye. Seeing him fall, the others ran down stream, but came back on hearing the carriers, who were collected there talking.