ivar at great risk for having people in this kind of condition living with you. it changed slavery dramatically in the country because the walls affecting enslaved people and particularly free black people changed after that. they could no longer learn how to read and write. they were pushed out of southern states for a year. there were still some family members are enslaved and occupations you were not allowed to have. so it really didn't change and caused any restriction. >> how large was the population in this period? >> is about one tenth of the population so if you have 200,000 in 1820 or so then you have about 200,000 of color. most of them were in the northeast and the midwest but also you have large populations the largest was in baltimore maryland and there was a large number in other cities to. >> what was the impact of. beecher stowe's uncle tom's cabin? >> it was very impactful and important. she captured the brutality of the institution and in so captured the imagination of the world. that became the most important book of the 19th century read more

how difficult has been coming back from rio ten months ago, barely any time to have a break, howard ivary awful. there were some very dark times. there was a hell of a lower after rio and having to press the reset button and find a new goal and start again with all the injuries and things, it has been a tough sort of nine months to come out and do about last night was a huge relief. you are very popular with the crowd, photographs being taken, your daughter in your arms at the end. quite emotional. how does it feel being a role model to so many young people? very strange. it is not who i saw myself hours. if i've inspired one person, then i have done myjob. you absolutely have. enjoy your break, go back to your family. you absolutely have. enjoy your break, go back to yourfamily. thank you forjoining us. i hope you get a bit downtime. it is the final day of these championships, great britain are well on track on getting a record number of medals here but so far they have 17 goals, 35 in total and we have them bretons in action today, one in the two metres, a long jump today, one in the t