(These "invisible bridges" sound intriguing...could the diary be talking about those islands in the far southeast?)

(Perhaps you should find out for yourself...)

• "I'll uncover the truth of it!"

Cross the invisible bridges to discover the secret of the three islands!

Invisible bridges, you say? That's preposterous!

• "They exist. Trust me."

Well, if it's like you say, it's not like anybody else is going to want to try them. How many times did you say you died again?

You found a diary that told of invisible bridges. You eagerly investigated the mystery.

Many, many tries later, you had visited all the islands. You told Gerania in Sanctum all about it.