Explanation:

- Impatient: This means showing a lack of patience or irritation over a delay or something that is slow to happen.

- Indignant: This describes feeling or showing anger or annoyance at what is perceived as unfair treatment or a wrong. It's a strong feeling of displeasure.

- Indifferent: This means showing no interest or concern. It implies a lack of care or feeling.

- Indulgent: This means having or indicating a tendency to be overly generous or lenient with someone.

The situation involves the owner being upset with the watchman for a perceived wrong or error. The most appropriate option would express anger or displeasure.

- Option 2: Indignant is the correct choice. It captures the anger and annoyance one would feel if a security breach occurred due to the watchman allowing a stranger inside.