Sophia had to follow up. When they reached the guard's room at the entrance to the community, the guard came forward to stop them.
The number of households in this upscale community was not large, and the doorman remembered the appearance of each household. Seeing the unfamiliar faces, he just stopped them to ask.
"I'm looking for Mr. Watson!" Sophia said, "He lives in Room 318 on the fifth floor of Building D!"
The guard called Watson and allowed them in after getting his approval.
Albert went ahead without saying a word. Later, they stopped at the door of Building D. He looked back at Sophia and said, "You make the call."
There was a telephone downstairs. Sophia called Watson and asked him to open the door. Then they walked into the building.
There was an elevator near the door. Sophia was about to walk towards the elevator when she saw Albert turning to the staircase on one side.