Secret of Terra (Terra Quest 1-10)

Synopsis
It was time to go down into a small crater near the mountain. Yet something in Summerle's behavior alerted Dull Echo. She matched the mosaic pieces together with such ease and speed...like she had been the one to make those pieces in the first place!

Completion
Did you finally figure it out? There is no ancient civilization here, and there never was. We just needed famous witnesses for our discovery. I'll get this award for contribution to science if it's the last thing I do; and you will keep quiet about it all. Otherwise, a certain someone will find out about your little secret.'