"Motor Matt's Double Trouble; or, The Last of the Hoodoo" by Stanley R. Matthews is a work of fiction, specifically a thrilling adventure story, likely written in the early 20th century. The narrative follows Motor Matt, a resourceful young man famed for his motor skills, as he navigates a series of escapades involving a stolen ruby and the treacherous actions of a Chinaman named Sam Wing. Alongside his cowboy friend Joe McGlory, Motor Matt must confront various antagonists in a race against time filled with excitement and danger. The opening of the story introduces the main conflict when a mandarin named Tsan Ti is aboard a train, carrying a precious red jewel, which he dreams of restoring to an idol’s forehead. Meanwhile, his treacherous servant, Sam Wing, secretly plots to steal the jewel from the mandarin. As the train travels through the night, Wing successfully pilfers the jewel, leading to a series of frantic events as Tsan Ti calls for help from Motor Matt. The ensuing chase promises high stakes, as both Tsan Ti's plight and the fate of the ruby entangle Matt and his companions in a whirlwind of intrigue and action. (This is an automatically generated summary.)