Hello, my name is Captain Oblivious

Ok, so I don't have a specifc agenda item, my main focus is on Captain Delano. I just don't understand his thinking. I did a little research and found that slaves were packed into ships, usually shackled up, mutanies did happen but often they weren't very successful. I don't understand why Captain Delano didn't seem to find it strange that there were slaves running around the ship freely. I also find it strange that he thought Benito Cereno was the one up to something. Well, I guess the first time I read this I agreed with Delano, I thought Cereno was up to something. But then again I was extremely confused, Melville seems to want his reader to remain in the dark until the end of the story. I realized the second time I read this that the signs are all there. The shaving incident is a good example. Cereno was scared to death Babo would kill him then and there easily enough if he said a word, thats why he was shaking so bad. As much as I understand this story a little better I don't get why Delano didn't get it until the last minute.