Jimbo by Algernon Blackwood — Read

Jimbo had fallen on his head. Inside that head lay the mass of highly sensitive matter called the brain, on which were recorded, of course, the impressions of everything that had yet come to him in life. A severe shock, such as he had just sustained, was bound to throw these impressions into confusion and disorder, jumbling them up into new and strange combinations, obliterating some, and exaggerating others. Jimbo himself was helpless in the matter; he could exercise no control over their antics until the doctors had once again reduced them to order; he would have to wander, lost and lonely, through the comparative chaos of disproportioned visions, generally known as the region of delirium, until the doctor, assisted by mother nature, restored him once more to normal consciousness.

For a time everything was a blank, but presently he stirred uneasily in the grass, and the pictures graven on the tablets of his mind began to come back to him line by line.