Final answer:
The answer regarding what Dulcie serves for breakfast after Emma and Ali are rescued from the lake cannot be provided as the necessary context is missing in the excerpts.
Step-by-step explanation:
The provided excerpts do not specifically state what Dulcie serves for breakfast the morning after Emma and Ali are rescued from the lake. However, various meals are mentioned throughout the different texts, including nicely baked thin corn-cakes, a clam chowder, and the preparation of supper which included dripping coffee.
Without context from the specific book or passage that references Dulcie, Emma, and Ali, it is impossible to determine the exact breakfast served after their rescue. As this information is not given in the excerpts provided, an accurate answer cannot be given.