The resident saw the direction of his assistant’s gaze and spoke sharply. “Back to your duties! Already I can see a green-and-orange banded chrysalis on that branch that hangs like a limp hand — there on the left, near the top! I don’t doubt that’s about to provide us with a magnificent nighttorch!”

“I must tend my wounds,” said Grolion. “They may fester.”

“Pah! I have salves and specifics. You can apply them tonight. Now get yourself aloft. If the nighttorch escapes, neither ale nor steagle shall pass your lips.”

“This is a sudden change of attitude,” Grolion said. “But a moment ago, I was being congratulated and promised promotion.”

“I am of a mutable disposition,” said the resident. “Many have tried to change me, but mine is a character that does not yield. You must fit yourself around my little idiosyncracies. Now go.”

The set of his shoulders an unspoken reproach, the assistant went back to the barbthorn. With the resident watching his progress, I thought it ill-judged to follow. But Grolion did not reascend the tree. Instead, as he neared its wide base, where the thick roots delved into the ground, he suddenly stopped then stepped sharply back, as if some dire threat blocked his path.

The resident noticed. “What is it?” he cried.

Grolion did not turn but peered intently at the tangle of roots, as if in mingled fear and fascination. “I do not know,” he said, then bent gingerly forward. “I have never seen the like.”

The resident came forward, but stopped a little behind the traveler. “Where is it?” he said.

A feeler reached out for Grolion. He batted it away and crouched, leaning forward. “It went behind that root, the thick one.”

The resident edged forward. “I see nothing.”

“There!” said Grolion. “It moves!”