Final answer:
Venters is the one who secretly watched over Valentine during the late hours of the night, dealing with his guilt and thoughts.
Step-by-step explanation:
The passage suggests that it is Venters who secretly watched over Valentine during the late hours of the night. Venters, troubled by his own actions and filled with self-reproach, stays awake throughout the night, his mind active with thoughts as he keeps vigil beside a dying girl he believes he has wronged.
This scenario is steeped in emotion and internal conflict, as Venters grapples with his feelings and the consequences of his actions.
The secret watcher over Valentine during the late hours of the night is not explicitly stated in the given information. The passages provided contain various descriptions and scenes that do not directly answer the question. Without additional context or information, it is not possible to determine who secretly watched over Valentine.