In Phoenix, ANTIQUES ROADSHOW host Mark L. Walberg and appraiser Natalie Linn visit the Heard Museum to discuss American Indian basketry. Valuable find: A violin made by the Gagliano family in Naples in the early 1800s and a violin bow made in France in the shop of Jean-Baptiste Vuillaume - the pair estimated to be worth between $ 72,000 and $94,000.