Everything you need to know about symbolism, imagery, and allegory in The Adventures of Sherlock Holmes, written by experts just for you. "Proud Mary." And even more, if you want them. The Mississippi River might as well be a national symbol ; it's definitely a majorly important symbol for Huckl. symbols of velvet, gold and precious stones are combined with the emotive symbols of white and green (purity and love). The pearl symbolises faith and.