I have received from a researcher in England the names of a number of my family members who were known glassworkers in that country in the 1700s and 1800s. In his response he asked for information about glass factories of that period in the US. Although many of my Cliff and Montgomery ancestors worked at glass plants in NJ and elsewhere I have no definitive information that I can forward to him. Can anyone suggest the source of such information that I can acquire at a reasonable price. Thanks, Don Cliff