Have set up a website with information relating to the 1790 Census. Right now it is for the state of New Hampshire and lists Slave Holder, Other Free Persons (OFPs) and Slaves listed in that census. This is a work in progress. Hope others will find it of interest and join this group to add/subtract or comment on any information they might like to share.
1790 Census: Slave Holders, Other Free Persons and Slaves