Mysterious bullion coins

He woke up in the middle of the night. It was a dark night and he immediately knew that he was in a deserted place. He stood up and shook the sand off his clothes. He looked at his trousers and jacket. They seemed to be some strange, unfamiliar objects. He looked at his hands. They were covered in sand, too. He did not have any luggage with him. He searched in his pockets for anything that would remind him of what had happened and what he was doing here. All he found was a couple of old bus tickets and three large bullion coins. As soon as his eyes could see anything in the darkness, he looked at the coins more closely. They were probably made of gold, but he could not decipher what was written on them and he had no idea how much they might be worth. Actually, he could not remember ever seeing them before. But now he had just found them in his own jacket. He suddenly realised that there was an extensive gap in his memory. He had been sitting with somebody in a restaurant, he had visited somebody"s house, and then... he did not know. It was as if the events had been completely erased from his memory. He put the gold bullion back in his pocket and started descending the hill. He could see some light in the distance so he decided to take that direction.