"Old Geibel had laid down his paper, and was listening with both his ears. On one of the girls glancing in his direction, however, he hurriedly hid himself again behind it.

"After the girls were gone, he went into his workshop, where Olga heard him walking up and down, and every now and then chuckling to himself; and that night he talked to her a good deal about dancing and dancing men--asked what they usually said and did--what dances were most popular--what steps were gone through, with many other questions bearing on the subject.

"Then for a couple of weeks he kept much to his factory, and was very thoughtful and busy, though prone at unexpected moments to break into a quiet low laugh, as if enjoying a joke that nobody else knew of.

"A month later another ball took place in Furtwangen. On this occasion it was given by old Wenzel, the wealthy timber merchant, to celebrate his niece's betrothal, and Geibel and his daughter were again among the invited.

"When the hour arrived to set out, Olga sought her father. Not finding him in the house, she tapped at the door of his workshop. He appeared in his shirt-sleeves, looking hot, but radiant.

"'Don't wait for me,' he said, 'you go on, I'll follow you. I've got something to finish.'

"As she turned to obey he called after her, 'Tell them I'm going to bring a young man with me--such a nice young man, and an excellent dancer. All the girls will like him.' Then he laughed and closed the door.

"Her father generally kept his doings secret from everybody, but she had a pretty shrewd suspicion of what he had been planning, and so, to a certain extent, was able to prepare the guests for what was coming. Anticipation ran high, and the arrival of the famous mechanist was eagerly awaited.