Lord Ashley's second wife was the French-born Françoise Soulier, daughter of Georges Soulier of Caudebec-en-Caux, France.
It evolved from an amalgamation of three earlier communautés de communes - Port-Jérôme, Caudebec-en-Caux and Canton of Bolbec.
Allen's best known plates are those after J. M. W. Turner's drawings for the ‘Rivers of France,’ 1833–5, consisting of views of Amboise, Caudebec, Havre, and St. Germain; and for the ‘England and Wales,’ 1827–32, for which he engraved the plates of Stonyhurst, Upnor Castle, Orfordness, Harborough Sands, and Lowestoft Lighthouse.