Read "The Great Airport Mystery" by Franklin W. Dixon online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
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 goodbye 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 field; a new machine was preparing for a takeoff. But the Ducroy plane was deserted and the lads saw that they were in good time to conceal themselves again.