Surveyor finds his favorite detective in the old warehouse on the port.
To this day, Layton still remembered the orphaned child he met wandering the street, wailing for his parents.
That child was Clive, now a young man and his only son. Clive never truly recovered from the accident that left him alone in the world. Maybe part of Layton felt guilty about leaving him on the streets, and took him in out of sympathy and their similarities, because he lost to the same accident. To say he regretted the adoption would be a lie, because Layton absolutely loved having Clive with him, despite the initial action of it being a rather impulsive decision.