. >> and at 6:00 p.m., on "american artifacts," we look at a selection of clifford barryman's popular political cartoons for the early 20th century. >> and clifford barryman continued to draw for the washington evening star for the next 42 years. his cartoons appeared almost daily, usually on the front page of the paper, very prominently placed, and he had quite an ill lustrous career. >> watch american history tv every weekend on c-span3. >> since 2011, architect and historic preservationist jobie hill has been visiting and compiling a database of former slave dwellings in the united states. her interdisciplinary work includes architectural documentation, photography, interpretation, and preservation of slave history. up next, on "american artifacts," we travel to southern virginia near the north carolina border to visit the former brandon plantation with jobie hill and learn about her saving slave houses project. she's joined by several archaeologists and preservationists and a team from trumpab tremble incorporated who came along to document the plantation with a series of 3d laser

on american artifacts, we look at a selection of clifford barryman's popular political cartoons from the early 20th century. >> and he continued to draw for the washington evening star for the next 42 years. his cartoons appeared almost daily, usually on the front page of the paper. very prominently placed. he had quite an illustrious career. >> watch american history tv every weekend on c-span3. >> all day coverage of the conservative political action conference continues tomorrow. energy secretary rick perry, interior secretary ryan zinke and congressman mark meadows -- chair of the conservative freedom caucus -- will be live here on c-span2 at 8:35 a.m. eastern. a little later our cpac coverage moves to c-span for president trump's comments. we'll also hear from kellyanne conway, linda mcmahon and fcc chair ajit pai. that's scheduled to get underway live friday at just after 10 a.m. eastern on our companion network, c-span. >> today former government officials talked about the impact of hospital mergers and the cost of health care. the insurance market and consumers. hosted by the