Sanders looked straight ahead.

"I thought—you see, we know—the tryp is a distinct little body, and anybody who had lived in this part of the world for a time can pick him out. Bones, of course, knows nothing thoroughly—I should have remembered that."

She said nothing until they reached the verandah, and she turned to go to her room.

"It wasn't nice, was it?" she said.

Sanders shook his head.

"It was a taste of hell," he said simply. And she fetched a quick, long sigh and patted his arm before she realized what she was doing.

Bones, returning from his hut, met Sanders hurrying across the square.

"Bones, I want you to go up to the Isisi," said the Commissioner. "There's an outbreak of some weird disease, probably due to the damming of the little river by Ranabini, and the flooding of the low forests."

Bones brightened up.

"Sir an' Excellency," he said gratefully, "comin' from you, this tribute to my scientific——"