I only have the first volume. It has no Cooks or Mills. It has an article on Col John Gill born 1761 in NJ and one on John Gill who came to Chester from NJ and died in 1797. There is an article on the Lewis family beginning with William Lewis born 1746 in Wales. Lists descendants and mentions Euphemia Gill. One article on Crawfords mentions John Dunwoody Crawford robert Bryson Crawford and James H Crawford.
I have access to the second volume, but not until Wednesday.