A series of new and expanded towns have often had a strong influence on local speech. Many areas beyond the capital have become Cockney-speaking to a greater or lesser degree, including the new towns of Hemel Hempstead, Basildon and Harlow, and expanded towns such as Grays, Chelmsford and Southend. However, this is, except where least mixed, difficult to discern because of common features: linguistic historian and researcher of early dialects Alexander John Ellis in 1890 stated that cockney developed owing to the influence of Essex dialect on London speech.