"Back again, I see," he remarked cheerfully. "No adventures this time, I hope? Good! Now, look sharp and change. There's someone to see you. Guess who."

"I don't know, sir," replied Colin. "We know no one here except Wynyard."

Desmond was equally at a loss.

"Do we know him?" he asked.

"Yes," replied Colonel Narfield. "Someone who has arrived unexpectedly, although at my invitation. Now, can't you make a shot at it?"

"Not Van der Wyck?" asked both lads simultaneously.

"Yes," answered the Colonel. "He's in the stables looking after his horse. He insisted upon doing that himself. Get a move on, and be ready to welcome your pal when he returns."

Ten minutes later, Colin and Desmond, having washed and changed their dusty clothes, went across to the stables.

"Him there, sah," reported Blue Fly, with his usual broad grin.

Eagerly and delightedly the two chums threw open the door. Then they stood stock still in utter astonishment.