Day eight
I have spent the early morning rummaging about in the cave. It was far, far deeper than I had expected, and I was not able to reach the bottom. I have discovered strange flora, including a plant that sprouts glowing bulbs, each the size of a grapefruit. I am currently using one of these to illuminate the way, as well as the pages I am writing. I have also discovered mushrooms that are easily the size of trees. Great canopies of blue mushrooms, each with a maze of roots and a hail of spores. It is akin to being in a waterless shower.
While down in these depths, I have found more Flint. This was quickly constructed into an ax, and I intend to taste these mushroom trees.

That's not a good idea

That was not a good idea. My stomach feels overfull, even as I am still hungry, and my head is swimming. What a terrible fate, to die by mushroom.
Ah, the feeling has gone away.

No mushroom kills me! Am too strong!

Willow, is that you?

I thought it was you!

It is I! Wolfgang! Mightiest of men!

Another one? I do not think I have enough space in my head!

Wolfgang always have space in head for you! Wolfgang can carry every puny man in his head!

But how? How long have you existed, Wolfgang?

Wolfgang has been for forty years! Wolfgang cannot be killed!

Forty years?! I am only 33! That's not possible!

Hah! Wolfgang not care! Wolfgang do as he pleases!

But...

No buts! Wolfgang is mightier than you, and is also right!

Jeez Willy, you know how to pick em.

Hah! Puny man's name is Willy! AHAHAHAHAHAHAAH! Makes much sense!

It is Wilson, thank you very much. If you have existed for longer than I have, I think you would know that.

Bah, puny man is just make excuses.

Whatever you say Wolfgang. Welcome to this weird family I suppose.

Wolfgang is strong uncle of family.

If he's the uncle, I dibs being the aunt. Ooh ooh, and all my kids are always on fire! Like little fire babies!

Neither of you are anything! Your both facets of my self talking to other facets!

Rude.

Wolfgang would punch puny man in his face, but Wolfgang cannot find him.

Look down at yourself Wolfgang.

Ah! What trick is this? Poor Wolfgang is in child's body!

Ahahahahahahahahahah!

Hush willow. For your information Wolfgang, my body does exactly what it needs to.

It is needed to suck?

Wahahahahahahaha! Oh my god, I take it back, this guy is great!

Why is my valuable brain space wasted on either of you.
So, disheartening news. It turns out my brain can create more personalities. This new one, going by the name of Wolfgang, appears to be an asshole. He also claims to have been with me since before I was even conceived. Clearly, he is also delusional. Further evidence comes from the fact that he believes himself to be stronger, physically, than me.

Oh god, what the hell happened?

If Wolfgang have to live in puny man body, he will make puny man not so puny!

I cannot feel my arms you lunatic! And I do not have enough food to support extra muscle!

Wolfgang will hunt food!

Well?

Wolfgang did not find anything.

Fantastic. Where are we?

Wolfgang thought desert would be best place for food.

The desert? Are you kidding me? What compelled you to go to the desert for food?

Is nature oven. We find roasted ham here.

Oh my god...

Oooooh, it's nice and warm out here.

Thank you for the input willow. Wolfgang, do you remember the way back?

The way back?

Yes, how do we get back to the mountains?

Wolfgang does not know.

Argh!
I am so tired. Wolfgang, my newest personality, has decided to go for a run into the desert. I did manage to locate the mountains, but my legs feel like rubber. I have found shade underneath a spiky tree. I still have my latest ax, which Wolfgang was nice enough to tie to my back, so I can make firewood when night comes. The sun is getting low in the sky, and I have begun sketching a map in the final margins of this journal. Using some rough math, I can use the height of the mountains to guess the distance and... Ten kilometers! How did Wolfgang run ten kilometers? In the desert? How am I not dead right now?

See, Wolfgang is strong.

Nobody is stronger than logic Wolfgang.

Bah. Wolfgang's muscle says other ways.

You do not have any muscles, you are a part of my body.

Aw, let him have it willy.

No! If I do, he will keep trying to kill me!

Am not killing! Am helping! Wolfgang will make you ultimate machine, like Wolfgang!

You are not, nor have you ever been, an ultimate machine! You are a part of me!

Wolfgang does not understand. Wolfgang thinks puny man is just scared of exercise.

I am not "scared" of excersise, I just do not want to die of exhaustion in the center of a desert where no-one will remember my name!

Wolfgang will remember you puny man.

You cannot- oh forget it, I am going to bed.