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.
There are few persons, even among the calmest thinkers, who have not occasionally been startled into a vague yet thrilling half credence in the supernatural, by coincidences of so seemingly marvellous a character that, as mere coincidences, the intellect has been unable to receive them.