How should I search for this article? Dowling, David. " 'other and More Terrible Evils': Anticapitalist Rhetoric in Harriet Wilson's Our Nig and proslavery propaganda"
A good way to search for any academic article or book these days is to begin with a Google search. Google now searches numerous other databases and thus provides a very quick overview of what is available where. Google will also give you a sense of how other people have used or responded to an article or book. Citations of books, in particular, can be found by using the "Google Books" search feature. By the way, your own question is already indexed on Google!
When I plugged the name of the author and title of the article into Google, I quickly discovered that the article is available through various data bases that are accessible mainly through library or individual subscriptions. For example, the article is available through Project Muse, an extremely helpful database but one that requires a subscription:
by D Dowling - 2009 - Related articles
David Dowling. "“Other and More Terrible Evils”: Anticapitalist Rhetoric in ...
I was hoping, however, that I could find the article for you in a database that would not require a subscription or an individual payment.
As it turns out, the article is available in its entirety and at no charge at this link:
Unfortunately, this source does not reproduce the article as a PDF file, so that you can see exactly how it looked when originally published (with original page numbers, etc.), but you can still cite this version in a paper.
The article can also be read in its entirety on Google Books since it was republished in a volume authored by Dowling. Here is a shortened version of the relevant link:
[Open in new window]
Hope this helps, not only in providing acccess to the article itself but also in showing you how easily research can be done these days, thanks in large part to Google!