How did Nehemiah first inspect Jerusalem's broken walls?

Answer: At night with a few men

Nehemiah went out at night with a few men, riding the only animal, and told no officials what he was doing.

“I set out at night with a few men. I did not tell anyone what my God had laid on my heart to do for Jerusalem. The only animal with me was the one on which I was riding.”— Nehemiah 2:12 (BSB)