In this final episode from Spokane, Washington, ANTIQUES ROADSHOW host Mark L. Walberg and appraiser Bill Mercer visit the Northwest Museum of Arts & Culture and its collection of exquisite beaded bags, crafted by Indian tribes of the Columbia River region. Discoveries abound at the Spokane Convention Center as well, including a circa 1900 Louis XIV-style clock, made in France and acquired by the owner's grandfather, who owned a silver mine in Montana; a beautifully preserved 19th-century silk Heriz rug; and an heirloom desk and chair used at the United States House of Representatives from 1857 to 1873. Rarely found together - with the desks being far scarcer than the chairs- the matched pair prompts appraiser Brian Witherell of Witherell's Americana Auctions to estimate the set's combined valued at $40,000.