 Between 1849 and 1856, he served as Barrington Lecturer for the Dublin Statistical Society (later known as the Statistical and Social Inquiry Society of Ireland).The Barrington Lectures, endowed by the Dublin businessman John Barrington from 1834, had as their objective the teaching of the principles of political economy to the lower classes in Ireland.Moffett delivered popular lectures in Ardee, Armagh, Belturbet, Clonmel, Coleraine, Derry, Downpatrick, Dublin, Dundalk, Dungannon, Galway, Holywood, Kilkenny, Lisburn, Lurgan, Trim and Waterford.