here's a guy who said i escaped from colonel hollingsworth's plantation, and he owned 50 slaves. all right, let's go to the census and yeah, there he is in exactly the right county with his 50 slaves. so you begin to find these stories are actually quite reliable when you can check them against other kinds of sources from the time. with still's information and the information in gaye, you can go back to the baltimore sun and find fugitive slave ads where the owner will actually put in an ad in the newspaper so and so has escaped, reward, you know, ran away, reward $100 for the person who will get him. they always say -- a funny phrase -- if anyone can get him and bring back, $100. that's a pretty good illustration of where they came from, who owned them -- >> host: indeed. doing. >> and they often had physical descriptions. you put all these together and you get a comprehensive picture. >> host: do we have any sense how successful these people were who did escape to the -- aside from douglass, of course. >> guest: you know, the problem is most of them just disappear from the hist