Flying Ace Rivers

Here's the WW1 Flying Ace discovering a new river; not one of water, but one of rocks!

But as a veteran river crosser, he feels even a rock river must be followed.  And as he followed it, he discovered multiple rock rivers.  They all coverged into one mega-river, then diverged back into different directions.

So the ace continued to follow the river he was on.  Where the river stopped, a lush bloom of desert plants grew in its place alongside a wall.

He looked over that wall, and there was his brother.  He finally found Spike, and the river of rocks helped him find his way, just as his intuition told him!