He does not feel secure
Oliver had been awake all night, unable to sleep. Oliver accepted his neighbor’s offer to stay with him because he was no longer at ease in his own home. Oliver calculated how long it would take to get to the jewelry store and deliver the gem. Oliver was already present when the shopkeeper opened the door.
Something’s Going On
The jeweler seemed to be anticipating him as he walked in. They greeted him warmly and said hello right away. Perhaps Mark told the jeweler about the rock, or there was something else Oliver was unaware of.