This wood,” Yam told him, “is like human memory. It does not need to take events in their correct order. Do you wish to go to an earlier time and start from there?”
“Would I understand more if I did?” Hume asked.
“You might,” said Yam. “Both of us might.”
“Then it’s worth a try,” Hume agreed.
They went together down the left-hand fork.

Author: Diana Wynne Jones