This is part eleven A of a series of booklets about the history of Hatfield in Hertfordshire. Part 11 is a study of some of Hatfield's trade and business families from the 17th century onwards. The eleventh book was published in two parts which we have retained for authenticity. This is part 11a. When this series of booklets was published 50 years ago, it was rightly regarded as an exceptionally authoritative and informative work. It has since remained unchallenged as the primary source of reference for anyone interested in the history of Hatfield. Recognising its enduring value, members of Hatfield Local History Society have undertaken this reissue now including a comprehensive index. The complete list of 13 titles can be found in each of the booklets.