Oasis

The door opens on a blasted landscape of rock and desert scrub; Ellen's using a tin-walled shack's door for the Milliways trip. Nearby a two-headed cow is contentedly chewing on a low, scrubby bush. One head lifts to get a better look at the new arrivals. The other one continues eating.

"That's Shiphrah and Puah," Ellen says, "my riding Brahmin. We're not far from Oasis- the path is through that rock formation up ahead."