Indian Runner duck the Pekin duck. As soon as the Indian Runners became fashionable, a demand for egg-layers and general purpose breeds developed. Using Runners crossed to Rouens, Aylesburys and Cayugas (the large black American breed), William Cook produced his famous Orpington Ducks. Mrs Campbell crossed her fawn-and-white Runner duck to a Rouen drake to create the Campbell ducks introduced in 1898. Later, she introduced wild mallard blood and managed to create the most prolific egg-layer, the Khaki Campbell (announced in 1901). Other breeds followed, some of which emerged as direct mutations of the Khaki Campbell, along with crosses back to Indian Runners,
Rouen an estimated population of 111,557. People from Rouen are known as "Rouennais". Rouen and its metropolitan area of 70 suburban communes form the Métropole Rouen Normandie, with 494,382 inhabitants at the 2010 census. In descending order of population, the largest of these suburbs are Sotteville-lès-Rouen, Saint-Étienne-du-Rouvray, Le Grand-Quevilly, Le Petit-Quevilly, and Mont-Saint-Aignan, each with a population exceeding 20,000. Rouen was founded by the Gaulish tribe of the Veliocasses, who controlled a large area in the lower Seine valley. They called it "Ratumacos"; the Romans called it "Rotomagus". It was considered the second city of Gallia Lugdunensis after Lugdunum (Lyon) itself.