approach of an elderly gentleman, who was walking slowly down the path that led from the house to the country highway which ran in front of it.
"A telegram, Tom?" asked the newcomer.
"Yes, dad," was the reply. "I was just coming in to ask your advice about it. Eradicate brought it to me."
"What, with his mule, Boomerang?" and the gentleman seemed much amused. "How did he ever get up speed enough to deliver a telegram?"
"Oh, Eradicate has some special means he uses on his mule when he's in a hurry. But listen to this message, dad. It's from a Mr. Hosmer Fenwick, of Philadelphia. He says:
"'Tom Swift—Can you come on to Philadelphia at once and aid me in perfecting my new electric airship? I want to get it ready for a flight before some government experts who have promised to purchase several if it works well. I am in trouble, and I can't get it to rise off the ground. I need help. I have heard about your airship, and the other inventions you and your father have perfected, and I am sure you can aid me. I am stuck. Can you hurry to the Quaker City? I will pay you well. Answer at once!'"
"Well?" remarked Mr. Swift, questioningly,
