By the way Mole - Ysabelle's parents died in The Great Nef - the driest desert on the Disc. An avalanche seems a little unlikely.
Mort nodded. "Your daughter," he said. "Mine? Ha," said Albert, " You're wrong there. She's his." Mort stared down at his fried eggs. Theystared back from their lake of fat. Albert had heard of nutritional values, and did'nt hold with them. "Are we talking about the same person:" he said at last. "Tall, wears black, he's a bit ... skinny ...." "Adopted," said Albert kindly, "It's rather a long story--" ..."My parents were killed crossing The Great Nef years ago. There was a storm, I think
. He found me and brought me here, I don't know why he did it." ( said Ysabell to Mort ((The Boy)) abridged from HarperTorch paperback 2001
Yup, that is correct. How Mort and Ysabell died is another story.
Aha! So, Bob's yer uncle... very clever.