Can you get as far as Widow Wisdom's?
There's a roaring fire and some grub waiting there.

We'll see after Wally." Percy staggered to his feet.

He had been wandering, he could not say where, all night.

The very mention of the words "fire" and "food" revived him.
"Get up to school as soon as you can and get to bed.

You can't be any use looking for the rest.