Final answer:
The clues from the texts suggest that the people upstairs in the given scenario may have left evidence, be superstitious, and frequently use the spiral staircase.
Step-by-step explanation:
In the given texts, there are several clues that suggest what the people upstairs could be doing:
- The County Attorney and the Sheriff are going upstairs to search for clues, indicating that the people upstairs may have left something behind.
- Mrs. Peters mentions that the people upstairs are superstitious and often leave, suggesting that they may have a reason for doing so.
- In the play text, Harry and Adelaide are heard coming up from the spiral staircase, implying that they had gone to the upper floor for some reason.
These clues help us infer that the activities of the people upstairs may involve leaving evidence, being superstitious, and using the spiral staircase frequently.