CHAPTER XIX

The Twenty-Eighth The next day was the twenty-seventh and the Hardy boys knew that they had another day to put in before Ducroy and his friends would be ready for the mysterious _coup_ for which they had laid so many plans. Frank and Joe were up early, and after a substantial breakfast at the farmhouse they said good-bye to the good-natured farmer and his wife, then hastened across the fields toward the airport again. There were a few signs of life about the hangars; some mechanics were busy at a plane out in the f…