jake 's books and a few items of clothing were still in there , so were the treasures he had picked up along the way - a rock which gleamed with yellow flecks that looked like gold but were n't ; an arrow-head , probably the leaving of the old forest folk , which jake had found in a grove of trees the day after his drawing ; some coins from his own world ; his father 's sunglasses ; a few other things which only a boy not yet in his teens could really love and understand .