The boys ate their meal hungrily. As they were finishing, Tom glanced at the big clock on the wall. It was now well past eight o'clock.
"Wonder why Dad hasn't come to the lab," he remarked. "I'd better call and find out if he's all right."
Tom picked up the telephone and asked the operator for the direct line to the Swifts' home. His father answered.
"'Morning, Dad!" Tom greeted him. "I thought after your call last night, you'd be over bright and early to see our visitor. He's already—"
"What are you talking about, son?" Mr. Swift broke in. "I didn't phone you last night!"
[CHAPTER XIII]
DISASTER STRIKES
Tom was thunderstruck. "You didn't phone me? But, Dad, I got the call—I definitely heard your voice!"
"That's impossible," Mr. Swift insisted. "Believe me, son, I slept soundly from the time I turned in until a little while ago."