The Stars of Ifrit

Client: Agapito (G-6) Port Bastok
Requirements: Bastok Reputation 3, Airship Pass
Items Needed: None
Key Items: Carrier Pigeon Letter
Title: Star of Ifrit
Repeatable: No
Reward: 2100g
Previous Quest: None
Next Quest: Love and Ice

Walkthrough:
Speak to Agapito, outside the air travel agency in Port Bastok. He has a riddle for you to solve and asks you to retrieve a letter he seeks.
"Under a full moon, towards the Stars of Ifrit, a bird delivers a letter to the ship in the sky."
To obtain the letter you must travel on in the right conditions. In this case, it is on the Jeuno - San d'Oria airship when the moon is full (nightime and moon ≥ 90%+).
Ride an airship between Jeuno and San d'Oria and look on the rail of the ship for a ???.
Click the ??? to obtain a key item, "Carrier Pigeon Letter".
Return to Agapito with the letter. He gives you 2100 gil.