 In the middle of that year, however, he fell out with his cousin and neighbour Magdalena Costa, whom he had courted, and this drove him to leave the city and return temporarily to Cádiz.There, an affair with a local girl led to the birth of his only daughter.Pueyrredón returned to Buenos Aires for the last time in 1854, and applied his engineering and architectural skills to the extensive public works upon which the city's port, separated from the Argentine Confederation, had embarked.