"So you know this place fairly well?" He was intrigued by this. "I haven't run across anyone yet who really knows this city in terms of having lived here before."
Tony pondered this question for a few moments, trying to think of the best way to answer it. He could tell the other man was looking for a serious answer and he was going to give him one.
"It's... a profession that demands much from those who practice it." That was the best way he could think of describing it without going into too much of his personal life. "However, it is a necessary profession and it can be very rewarding."
"'Investigations'?" Tony echoed. "What type, if you don't mind me asking."