Wednesday is the day that Jesus got betrayed, and Friday is the day He got crucified. From other answers, you can see it is because Christians didn't want to act like the hypocrites who fasted Monday and Thursday. Those were the Jews.
When an author uses ethos, they are trying to make the information look trustworthy enough that you believe what they are saying is true.
Upon arriving in the American continent, Columbus was impressed by the size of the place and the number of natives that already occupied these lands. He saw great economic potential in the American territory for the Spanish crown and was quick to write about his discoveries. He claimed that the territory was extensive, with a large number of trees, fruits and animals that could be exploited and generate great wealth for the Spanish crown. In addition, he predicted that this exploitation would have a small economic expense, since it would be possible to conquer and enslave the natives, forcing them to work towards Spanish objectives. He also said that these peoples would be easily converted to Christianity, calling for exploitation to be cursed.
Hope this helps :)
