Alone
Arthur woke up to the sound of heavy rain on the stone floor just outside his cave. He was slightly afraid at first but in his barley awake mind he remember that the fall of water outside was not dangerous after several minutes and a short conversation with a rock he remembered that it was called rain. It had been three years since Ford left. Names of simple thing began to leave his mind around six months after. Arthur would talk to the trees and rocks but he still missed the sound of another person's voice. Even though he hated the humanoids he and Ford had crashed on Pre-Historic Earth with, he missed them when most died during winter and the rest said they need a vacation.
He missed his friend Trillian and (to his surprise) Zaphod. He even missed Marvin. Arthur thought that his life was hard after Ford saved him from dying along with the rest of the population of Earth when the Vogons destroyed it. He was alone. He had started a collection of interesting rocks, he especially loved the one that looked like Marvin. He had done exactly what a hitchhiker was supposed to do; he had kept track of his towel. His towel was everything to him now. He talked to it right before bed every night, they would lie on the grass and look at the stars together. Arthur was thinking about going mad but what he didn't realize was the fact that he already was.
He thought about all the adventures he and his strange friends had together: going to Magarethia, meeting Zaphod Bebbelbrox the Fourth as the result of calling upon his late spirit minutes before their demise, time traveling to Milliways, and narrowly escaping being burned alive in a stuntvehicle. He missed everything even though he wished he hadn't done them at the time. He began to cry as he did every night he remembered. He put his head on his towel/pillow/friend and let the rain sing him a song of memory and eventually he fell asleep feeling as if something big was going to happen soon but he didn't know when. As he slept the rain stopped with the promise of a magnificent day ahead. The Universe knew that Ford would arrive at his cave the next day, it knew everything that was going to happen and even though Arthur couldn't tell, he played a major role in the game it was playing. If only Arthur knew.