 Complete the following phrase:  The story of the Canadian foundation begins when four American ladies, black-robed, black-capped, landed in Halifax from the Cunard liner Cambria on May 11, 1849. They came from New York City, these first Sisters of Charity, in response to a standing request by Bishop William Walsh of Halifax to his friend Archbishop John Hughes of New York for Sisters to work in his diocese in the care of orphans and in education. Halifax had a population of 20,000 when the four American ladies arrived. The Bishop gave them a house on Barrington Street, near the cathedral, where they took in a little orphan girl on the very first day. They immediately opened a school to teach Catholic children, many of them Irish immigrants, victims of the 