But, while he now knew Anne from Dorcas and Dorcas from Miriam by their faces alone, it had not been so when first he came here.  For several days Mike had distinguished between them by size and coloration - and, of course, by voice, since no two voices were ever alike.  But, as sometimes did happen, all three females would be quiet at once and then it was well that Anne was so much bigger, Dorcas so small, and that Miriam, who was bigger than Dorcas but smaller than Anne, nevertheless need not be mistaken for the missing one if either Anne or Dorcas was absent because Miriam had unmistakable hair called "red," even though it was not the color called "red" when speaking of anything but hair.