I believe that there is rising interest in ancient history and archeology at the independent schools. Â My former neighbor, a classics phd, worked in that area at a Friends school here in Philly Â and seemed to have counterparts at similar schools. Â (His wife, btw, is ABD in Renaissance art history and has gone on to a thriving career in interior design.) Â I'd strongly advise your wife to pursue the private school route. Adjuncting, either at community colleges or liberal arts colleges, is a very difficult path. Â Part-time faculty really do get exploited, and the students' preparation is often quite poor. Â But it is also the case that art history and archeology are languishing these days. Â There's almost no tenure-track hiring in either field, and many institutions don't have functioning departments in either discipline. Â So there might be some decent adjuncting opportunities out there.
A private school will NEVER hire someone to teach art history and anthropology, simply because those aren't really subjects taught there. Teachers there are usually expected to teach several subjects, and subjects are usually the core ones with some electives, like anthropology, but they probably wouldn't get someone just for one course. She could probably be a history teacher, as she is overly qualified in the area of research and such. She would probably have a huge advantage in applying, but it's doubtful she'd get something as specific as in her field.