I'll bet you anything you like that half an hour after they have met, they will be calling each other sister. Women only do that when they have called each other a lot of other things first.
Mr. Lyell's system of geology is just half the truth, and no more. He affirms a great deal that is true, and he denies a great deal which is equally true; which is the general characteristic of all systems not embracing the whole truth.
...those little people, my brownies, who do one half of my work for me while I am fast asleep, and in all human likelihood do the rest for me as well, when I am wide awake and fondly suppose I do for myself.