chest locks long john silver pirate pirate chest pirate treasure pirates robinson crusoe sea chest strong box treasure treasure chest treasure island beach los cabos Mexico pirate ship sail boat treasure hunt goatskin letter letter paper old paper old parchment paper parchment treasure map antique antique paper antique poster antique stationary blank paper brown paper old old parchment pirat old stationary Parchment paper poster blank stationary abstract ancient background backing beige blank brown canvas concept copyspace creation design fill graphic image New original pirates treasure map render sepia sign stained stains style tag texture unique vector vellum vignette