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In the town of New Castle it was not possible to trace the onset of the influenza epidemic to a definite case. As the health officer stated, several cases were reported at once.

The first case of influenza in Indiana, Pa., of which there was any definite knowledge occurred on September 15. A clothing merchant who had just arrived from New York, where he had been buying stock for his store, was the first case identified. The next case occurred several weeks later, the disease being contracted at the mining town of Coal Run, in Indiana County.

A man resident in Sharpsburg who had suffered from influenza visited friends in Fraser Township, Allegheny County, to convalesce. Previous to his coming that section had been free from the disease. He was still coughing at the time, and, moreover, he is said to have been a great talker and visited largely among the neighbors of his host. Threshings in that part of the township were going on and these he also attended. The date of his coming was October 13. By October 15 his hostess was taken ill. By October 16 some of the threshers were affected, and by October 17 enough were sick to break up the work of threshing. Eventually all the men engaged became ill, and 11 families were infected from this source.