I also went through some issues of the Jewish Daily Forward. This newspaper was one of a number of ethnic, non-English language papers in New York City. I have had a chance to examine many of them, and have found articles, reviews and some unusual and interesting advertisements - including this advertisement for Love Em and Leave Em.
I also found some more film reviews and articles in papers such as Hartford Times (Connecticut), Evening Bulletin (Providence, Rhode Island), Albany Evening News and Ithaca Journal News (New York). I also scrolled through two other newspapers further afield - the New Orleans States (Louisiana) and Eugene Guard (Oregon).
I also looked though microfilm of the Cherryvale Republican, the actress's Kansas hometown newspaper. Cherryvale is a pretty small town, and the Cherryvale Republican a pretty small newspaper. Nevertheless, I was pleased to find a few small front page advertorials (a kind of hybrid advertisement with a bit of editorial content) which proudly boasted that the current film featured "Cherryvale's own Louise Brooks."
I expect to make fewer trips to the library next year. Along with Canada, I need only finish off some requests from three states - Connecticut, Pennsylvania, and New York.