The one he held in his hand had a golden edge of a far deeper colour than most of the others. It was also a peculiar shape, the centre standing out for all the world like a bruise on the forehead caused by a heavy blow. He felt it, and its perfect roundness made him wonder what had caused it.
He opened the shell, and as he withdrew the knife it shut again with a snap.
"I'll have you next time," he said to himself, and managed to cut the muscles. After cleaning out the fish he examined the shell carefully. It seemed quite dark in the centre, and this struck him as curious. He dug round it with the sharp point of the blade and in a short time a large lump came away from the shell. There was evidently an outer coating, and this he removed, when to his utter astonishment he saw a black egg shaped pearl of great size.
He had heard there were such things as black pearls and that they were very rare and valuable. Had he stumbled across a treasure at last? He handled it tenderly. The pearl was perfect in shape, nearly the size of a pigeon's egg. It was free from blemish, he saw that even with his inexperienced eyes; there was not a speck on it, and it weighed heavy. He feasted his eyes upon it, wondering if it was genuine and what it was worth.
He examined the shell again, but found nothing else; the black pearl, however, was sufficient, and he meant to give his comrades a surprise on their return.
His luck was evidently in, for in the lot of shells he opened he found some of the largest pearls they had yet obtained. Some were curious in shape, being twisted into various designs, one was half black and half white, and larger than the pure black one.
When he had finished his task, he cleared up the shells, put the pearls away, and sat down to have a smoke, lazily watching the dinghies in the distance. At last he saw them coming towards the schooner, and called the boy to ask if supper would be ready, as he knew they would not want to wait. The boats were heavily laden, and it took some time to put all the shells on deck.
"You have had another good day," said Jack.
"Splendid," replied Jacob, "and I think we had better clear out for Fremantle as soon as you like. We have several tons of good shell on board, and some hundreds of fair sized pearls besides the seeds. The trip will pan out well and Barry Tuxford will be satisfied. It will not be long before he sends here again with a better equipped lot of boats."
"What do you say, Phil?" asked Jack.