Overview: Part 1 of 3 in El Paso features a 19th-century Fiji split whale's tooth necklace; Andy Warhol's 1966 artist's proof of a Jacqueline Kennedy print; and a signed 1937 first edition of J.R.R. Tolkien's "The Hobbit" that's valued at $80,000 to $120,000. Also: a visit to the Centennial Museum highlights pre-Columbian pottery from the Casas Grandes culture.