and then lady greystoke wiped her greasy fingers upon her naked thighs and took up the trail of kulonga , the daughter of mbonga , the king ; while in far-off london another lady greystoke , the younger sister of the real lady greystoke 's mother , sent back her chops to the club 's chef because they were underdone , and when she had finished her repast she dipped her finger-ends into a silver bowl of scented water and dried them upon a piece of snowy damask .