From 1922:
Two lb. flour, 1 lb. best butter, 1 ½ lb. sugar, one dozen new-laid eggs, one packet of mixed spice, two teaspoonfuls of cream of tartar, three quarters of a teaspoonful of bicarbonate of soda, one teaspoonful of salt, two small tablespoonfuls of treacle, ½ lb. of almonds, blanched and cut, 2 lb. sultanas, 1 lb. currants, ½ lb. candled peel. Cream the butter and sugar add eggs, well beaten, then the flour and other ingredients. Mix thoroughly, bake for two hours in a moderate oven. Rising is not generally added to a rich cake. The butter and eggs between them should, if the cake is well beaten, ensure its rising.