Game and the Candle

"[...] "John, as we entered the avenue to-night, there was a man standing near the olive-trees. Mr. Preston stopped the car and called to ask what he did there. The man answered that he was waiting to see you about some gardening work, but it was so late that you must have forgotten. He sounded honest, but Mr. Preston bade me warn you, saying that a man, once your father's servant, had just been released from prison, and might use a knowledge of Sun-Kist to attempt burglary. You will be careful?"[...]".