ANTIQUES ROADSHOW is taking inspiration from the furnishings and finery of the sprawling estates in popular period dramas such as "Downton Abby" and "Upstairs Downstairs" for its new special. "Manor House Treasures" features extraordinary objects from across the pond - and beyond - that would fit right in any stately homes of the rich and powerful, including a Lord Byron cellarette and portrait, ca. 1810; a Louis Vuitton steamer trunk, ca. 1915, that was gifted to the caretakers of an estate; and a Louis Comfort Tiffany necklace, ca. 1905, that belonged to the owner's wealthy great-grandmother and is appraised for $75,000 to $100,000.