"I should put that question to you, uncle," she replied. "You look as if you had just arisen from the grave!"

"Oh, there is nothing the matter with me. I did not sleep much. The overseer at Unkenheim writes to me on the part of my Italian friend, begging me to come as soon as possible to the factory, where everything is going wrong. I think it my duty to do what I can in the matter, as I know all about the business, and unfortunately advised my friend to make the purchase."

"Are you going, then?" asked Ernestine, with a feeling of secret delight that she could not explain to herself.

"Yes, I must leave you for a few days, hard as it is for me. But promise me before I go that you will have that treatise that you are at work upon completed by my return. Let nothing prevent you from finishing it. If you feel unwell,--you know that is of no real consequence,--you can readily overcome all your ailments by resolutely willing to do so. Take quinine, if you must. Now may I rely upon finding the essay complete when I see you again?"

"Yes, uncle, I promise; and if I do not keep my word, it will be for the first time in my life."

"Farewell, then, my child,--I must hurry to catch the train. Let nothing interrupt you,--do you hear?--nothing!"

He hurried out, and sought the housekeeper. "Frau Willmers," he said, "I rely on you to prevent Fräulein von Hartwich from receiving any visitors, be they who they may. If I find, upon my return, that you have permitted the least infringement of my orders, you may consider yourself dismissed. I cannot tell you when I shall return. Conduct yourself so that you need not fear my arrival, for it may take place at any moment."

"Rely upon me entirely, Herr Professor," replied Frau Willmers; and Leuthold got hastily into his vehicle.

"Now, that sly master of mine thinks all is secure, and that he has the heart of a girl of two-and-twenty under lock and key. How stupid these clever folks often are!" After this fashion Frau Willmers soliloquized, as her master drove off.

[CHAPTER V.]