Massa Tom; but I ain't gwine t' let him in lessen as how you says so."
"An army gentleman!" repeated Tom.
"Yais, sah! He say he General Waller, an' he come on a motor-cycle."
"General Waller!" exclaimed Tom. "What can he want out here?"
"And on a motor-cycle, too!" added Ned. "Tom, what's going on, anyhow?"
The young inventor shook his head.
"I don't know," he replied; "but I suppose I had better see him. Here, Koku, put this powder away, and then go outside. Mr. Damon, you'll stay; won't you?"
"If you need me, Tom. Bless my finger nails! But there seems to be something wrong here."
"Show him in, Rad!" called Tom.
"Massa Gen'l Herodotus Waller!" exclaimed the colored man in pompous tones, as he opened the door for the officer, clad in khaki, whom Tom had last seen at Sandy Hook.
"Ah, how do you do, Mr. Swift!" exclaimed General Waller, extending his hand. "I got your letter inviting me to a test of your new explosive. I hope I am not too late."
Tom stared at him in amazement.
