Possible Clues:

• Henry taking steps in the gloaming
• Henry sitting on stairs in the gloom?
• Escape at end of short passage in gloom
• Stop short and escape in the gloaming
• Mostly stop group of aircraft in limited visibility
• Shakespearean prince fleeing in the gloaming
• Dusk? Briefly make stop on journey
• State of limited visibility almost put a stop to escape
• Dawn perhaps steps on Henry
• Almost completely stop air travel for dusk