Carben's Letter

, also called From Carben, is an Series: in. As its name suggests, it is a ST: from ST:.

Location and Uses
Unlike most NaN Letters in, which are delivered to ST: by the ST:, ST: is given directly to ST: from ST: after the two play the ST: to restore the ST: leading to the ST:. ST: forgets how to access the ST: where the Temple awaits, but had fortunately written the ST: to himself as a reminder. Attached to the ST: is a map of the ST: with three numbers written at the locations of the statues holding glowing red orbs.

While driving the ST: toward the statues, ST: passes ST: taking photographs of the newly-restored ST:. If the young hero stops to talk, he will learn from ST: that the statues respond to "big noises", hinting that he must sound the Train's ST: while driving past them. Doing so in the order shown in ST: opens the pathway to the ST:.

Transcription
"Dear Self, I know you'll forget, so I'm leaving you instructions to get to the ocean floor. -- Carben"

- Carben's Letter