added. âHe knew about the alarm system the museum used to have, and he was on guard that night.â
Wilcox got to his feet. âIâd like to stay longer,â he said, âbut I have to catch a plane to Chicago for a conference of archeologists. In fact, Iâm the main speaker. You boys know what you have to do, so Iâll leave the investigation to you.â
âWhat about the mummy?â Colden asked.
âYou and Najeeb are in charge,â Wilcox replied. âSee that the case is prepared for shipment to Cairo and cooperate with Frank and Joe in the matter of the stolen statuettes.â
Wilcox left, and Colden excused himself to make a phone call. Najeeb Salim stood up and paced around the room. âPerhaps we should have Ali arrested at once!â he proposed.
âWe canât,â Frank said. âThereâs no real evidence against him. Even though we saw him holding the dagger, we donât know what he intended to do with it. »
âThen we should dismiss him! Why give him another chance to steal?â
The Egyptianâs vehemence began to arouse Frankâs suspicion. âMaybe Salimâs involved in this and is looking for a scapegoat,â he thought.
The same idea occurred to Joe, who made a mental note to keep an eye on Salim. Just then Colden returned from his office. âI talked to Cairo,â he announced. âTheyâre ready for you and the mummy, Najeeb. Howâs the investigation coming along?â he asked Frank and Joe.
Frank shrugged. âAli is our prime suspect so far, but we donât have any proof. What do you think, Mr. Colden?â
âI think we should have a cup of coffee,â the assistant curator replied, âand go over the events point by point. Iâll call the kitchen. Will you boys join us?â
âIâd prefer a soda,â Frank said. âThereâs a machine at the end of the hall. How about you, Joe?â
âSodaâs fine.â
Frank went out and came back with two colas. He handed one to Joe just as the woman who ran the museumâs kitchen arrived in the office. She was an attractive blonde in her late twenties whose somewhat sharp features softened for a moment as she smiled at the boys.
âIâm Norma Jones,â she said. âIf you want anything from the galley, just say the word.â
Colden settled himself on the sofa with Salim beside him and the Hardys occupied the chairs in front of the desk. Norma Jones left and closed the door behind her.
âThe police interrogated the staff,â Colden began, âbut no one could shed any light on the matter. â
âI suppose they searched the premises for clues?â Joe inquired.
âThey did,â Salim replied. âIt took hours since there was no sign of breaking and entering. Butââ Suddenly a strange look came over him. His pupils dilated, and his breath came in short gasps. He shuddered and ran his fingers around his collar in an effort to loosen it.
âMr. Salim,â Frank exclaimed, âare you okay?â
There was no reply. Instead, the Egyptian jerked to his feet and lunged toward the young detective. His fingers reached for Frankâs throat in a convulsive grip! The chair went over backward, and the pair landed on the carpet. Savagely, Salim tried to strangle Frank Hardy!
3
Mummy Powder
Joe leaped to his brotherâs aid, but Frank had already managed to break Salimâs grip. Pushing the Egyptian aside, he scrambled clear. Salim jerked to his feet again. For a moment he swayed there and the boy braced for another violent attack. However, Salim suddenly collapsed onto the carpet, rolled over, and lay motionless!
âWow!â Joe exclaimed. âWhat got into him?â
Frank pointed at Colden. âSomethingâs wrong with both of them!â
Colden was leaning back on the sofa. His eyes were closed, and he gasped loudly. Joe shook him, and