Arthur Tappan was an Abolitionist who helped to found the American Anti-Slavery Society. Many people know him for his ideas on slavery.
The Tappan brothers were more conservative than Garrison, that is why they always did not get a long. Garrison was more radical on his ideas and the Tappan brothers did not always agree on the same ideas. One of the big ideas they did not agree on was fighting for women to get rights, Garrison wanted to fight for it the Tappan brothers didn't.
Lewis Tappan was an Abolitionist who helped to found the American Anti-Slavery Society. Pro-Slavery people did not like Lewis, since they didn't like him they attacked his house.