U.K. travel, tourism and cultural specialist Robert Harding World Imagery says its Web site traffic has experienced a 20% increase in the past six months as a consequence of technical and content updates. Buyers are also spending more time online. Harding, who founded the agency in 1972, said it has added over 250,000 new images and relaunched the site with faster and easier tools—such as drag-and-drop lightboxes and full-screen previews. The agency will continue expanding its collection.