马迹蛛丝

Explanation: Horseshoe marks, spider filaments. Faint traces of metaphors and clues to be found 　　Usage: Joint type; as object; that leads 　　Source: Qing Wei Zi "Yue Hen" The Fifth: "out of the dark, middle of the side in the positive side, Mournful, horse track spider silk." Thesaurus:  Web Maji