[[File:Mucky Mammoth cabin draft.jpg|thumb|right|''CATE: The nice thing about the story cliff is you can start reading anywhere you want. There's no ''beginning'' or ''end'', just a bunch of ''middle''.'']]
[[File:Echo River 2 draft.jpgpng|thumb|right|''WILL: It's not usually on the ''[[Lake Lethe|lake]]'', though ... that was strange.'']]
=== The Mucky Mammoth ===
On board, Ezra makes observations from the captain's chair and Cate talks to him about the floating gas station, what the dials and gauges on the dashboard mean, and her home-brewed "Kykeon Kombucha[[wikipedia:kykeon|kykeon]] [[wikipedia:kombucha|kombucha]]." She tells him that she relies heavily on landmarks and lights, as compasses don't work well on the Echo. She tells him about the landmarks they've passed so far – Duck Island, the Lighthouse, and the Story Cliff. Noticing they should have passed Dinosaur Rock by now, but haven't, she sends Ezra to the map room to help Will update the charts.
On his way there, Ezra records more sounds. He encounters Conway, who tells him that he doesn't use maps, and instead remembers roads using landmarks or asks for directions. After walking past Shannon, who is trying out Clara's theremin, Ezra finds Will who asks him for information to update the charts, since locations on the river often end up shifting in position. As a thank you, he offers a selection of old maps charting underwater islands.
=== The Mucky Mammoth ===
While some of the crew goes to drink, Shannon stays aboard and watches old tapes on the TV in the video room. The videos focus on a variety of subjects, from documentaries about birds to weather programs to a taping of a funeral. One video features a young Will taking calls about supernatural stories, just to listen, with a banner hung in the background reading "I BELIEVE YOU." Shannon inserts a tape labeled "???" and begins to hear a humming sound. [[Weaver]] stands in a dingy room with blank, gray walls and video equipment in the corner, looking directly at [[File:Mammoth video room draft.jpgpng|thumb|left|''That awful hum ... it seems to start before Shannon even hits "play."'']] the camera. She begins to speak. Only the hum continues, but Shannon recalls her words as they appear in captions on the screen:
:'''''WEAVER:''' ... mail, school, and these magnificent, tragic horses. Go underground, as deep as you can go. The air is cool and the earth is damp, and when you close your eyes you are surrounded by the dead. Remember where that is? You'll find your way from there. I think this place is what you're looking for. Some of it will wash away soon, but I think you'll be happy here, even without the mail, school ...''