When two advancing tribes, with strong mental and physical characters, are brought together and blended into one people by the accidents of barbarous life, the new skull and brain would widen and lengthen to the sum of the capabilities of both.

• 两个正在进步的部落混合在一起了，新生一代的颅骨和脑髓便自然地扩大到综合了两个部落的才能的程度。”