Complex sentence: Later in the century the production declined due to competition from imported European glass-ware, however, the products of Hebron continued to be sold, particularly among the poorer populace, not least of all by travelling Jewish traders from the city.
Split into simpler sentences: Later in the century, the production declined due to competition from imported European glass-ware. However, the products of Hebron continued to be sold, particularly among the poorer populace, not least of all by travelling Jewish traders from the city.