I wondered if anyone might be interested in helping in the above project. It's on Zooniverse(a site where the public help classify research data on many projects).
In this project you would be looking at old 18th /19th Century newspaper and highlighting any advertisements relating to Slavery.
Please be clear there is a content warning and you are advised to consider how upsetting it might be.
I have no link to this site other than as a hobby.