This is from a leaflet from the famous Durgin Park Restaurant ('Where your grandfather dined a century ago'),

Mix all the ingredients thoroughly with one half (3/4 quart) of the above hot milk and bake in a very hot even until it boils. Then stir in remaining half (3/4 quart) of hot milk, and bake in a slow oven heat for five to seven hours. Bake in a stone crock, well greased inside.