ANTIQUES ROADSHOW stops in Austin, where host Mark L. Walberg joins appraiser Bruce M. Shackelford at a private collection to learn about antique Mexican saddles. Highlights include a scrapbook of World War II photos from the owner's grandfather-in-law who was one of the "Monuments Men"; an 1875 "Pictorial St. Louis" atlas including birds-eye maps of the entire city, drafted in a hot air balloon; and an inherited jade ring with case, made around 1930, whose impressive size and rich green color give it its value of $60,000 to $80,000.