Source 1. Evening Post would be a primary source. Tyler Anbinder used this source mostly in his book(so we may assume it gave him many ideas and info for their own book). Evening post illustrates us a lot of information about New York in that time, people and their lives there. There are a lot of data and examples, so reader could easily imagine and compare information. This source seems me convincing too. As example, Evening post reported : ” Lansdowne must have been predisposed to accept Trench’s reasoning, writing him a check on the spot for £8,000 (roughly $650,000 today) to be used to initiate the project. By the end of 1851, Lansdowne had spent £9,500 (perhaps $760,000 today) on emigration.”
Source 2. O’Sullivan Diary would be a secondary. I think that any diary source looks like secondary because diary has subjective opinion of somebody who lived in that time. it covers observation just the only one person. So it could not be objective. But usually it is very interesting, because people in diary write not only common information but goes into details and description as well. What is more fascinating that author reveals his feelings and it has an impressionable effect on the reader. O’Sullivan reported:” I attended myself a poor woman, whose infant, dead two days ago, lay at the foot on the bed, and four others nearly dead at the same dead, and horrible to relate a famished cat got up on the corpse of the poor infant and was about to gnaw it, but to my interference.”
Source 3. Sun would be a primary source mainly because it is newspaper of 1830s. In my opinion Sun reproduces conditions and mood of the city the best way. I found this source credible and reliable. Sun’s reporter was also horrified at how Five Pointers made public spectacles of themselves:”At night the streets and sidewalks are literally blocked by swarms of sturdy vagabonds of both sexes; the grog shops are filled …horrid oaths and execrations burst upon the ear from every tipling house, and brothel, and the most abominable indecencies of every kind, by word and deed, are perpetrated and heard.”