administration building.
Two Egyptians were waiting as Winston and the boys walked down the stairway, and the scientist at once hurried to greet them. Obviously the three were old friends.
Winston introduced the two boys. The older of the two Egyptians was Dr. Abdel Kerama. He was a tall, gray-haired man of distinguished appearance. Rick thought that in traditional desert costume he would look like the head sheik of all the desert tribes. The younger Egyptian was Dr. Hakim Farid, a youthful, clean-cut man with an attractive smile.
Rick knew from Winston's advance briefing that these were the two leading radio astronomers of the United Arab Republic, and that both had international reputations in the field.
The Egyptian scientists made the boys feel at home right away. Dr. Kerama took Scotty and Winston by the arms, and Dr. Farid fell in step with Rick as the group walked toward the administration building.
"We're glad you could come," Farid said in excellent English. "We'll try to make your visit interesting."
Rick thanked him. "I don't know whether we'll be of much use, but we're willing to do anything we're told. All we ask is a little chance to see your country."
"You'll have every chance," Dr. Farid told him. "Before there is any work for you, Parnell will have to do a pretty thorough analysis of data we've collected. It's a problem that has us … what's the American expression? Buffaloed?"
"That's it," Rick agreed. "What kind of problem is it?"
"It's what you might call very strange behavior on the part of a hydrogen-line impulse we picked up while calibrating our receiver. Are you familiar with radio astronomy?"
"Not very," Rick admitted. "I tried to read some of the current literature when I found we were coming, but most of it is over my head."
"Then I won't bore you with a technical discussion. Briefly, the noise emitted by hydrogen gas in space is very important to us in our analysis of the nature and distribution of matter. This radio noise is, of course, random. Usually when we are examining a hydrogen source we get pretty continuous and regular signals. If we could hear it, there would be a sort of hissing noise. Do you follow me?"
"So far."
"Good. Our problem is that we are picking up impulses. You might even call them signals. They are on the frequency of neutral hydrogen, but it's hard to believe they're natural in origin. We've about concluded that somehow our amplifier system is modulating the incoming hydrogen signal from the antenna. The trouble is, we can't locate the cause."
"Is that why you called Dr. Winston?" Rick asked.
"Yes. He has a reputation for finding bugs in electronic circuits. If he can find this one, we'll be tempted to reward him with a pyramid or something appropriate."
Rick saw the twinkle in Dr. Farid's eyes. "Better not make it a pyramid," he said hastily. "His luggage is limited to sixty-six pounds. They might not let him on the plane with it."
"A happy thought," Dr. Farid said seriously. "You have saved us from possible embarrassment. It would be useless to give him a pyramid when his weight limit is thirty kilos, as we call sixty-six pounds."
Rick chuckled. One reason he so enjoyed his association with scientists was the dry sense of humor most of them seemed to share.
They reached the administration building and started through the formalities of customs and immigration. The Americans had filled out customs forms and currency declarations on the plane, and in only a short time the formalities were over and their admission into the United Arab Republic was official. The customs inspectors hadn't even asked them to open their luggage.
The trip from the airport took over an hour. It led through Heliopolis, City of the Sun, the first capital of a united Egypt. The land had been governed for over a thousand years from Heliopolis. But that, as Dr. Kerama explained, was over four thousand years ago.
Rick was awed. Coming from a new land where a hundred years seemed a very long time, the antiquity of Egypt stirred his imagination. But there was little that seemed ancient in modern Heliopolis. There were attractive, modern apartment houses, new public buildings, and rows of trees carefully trimmed into perfect green cylinders.
The entry into Cairo itself was through rows of tall wooden or brick structures, along streets traveled by everything from the latest European cars to plodding donkey carts. The people were dressed in a variety of costumes, from suits and dresses that would have been suitable in New York, to traditional Arab dress with flowing robes and the cloth headdress that is held in place by a band or roll of fabric around the head, just above the eyes.
The car passed the railroad station and the great statue of Rameses the Second, Pharaoh of Egypt. The Nile came into view, and Farid pointed out the row of hotels on the other side. The Shepheard's and the Nile Hilton flanked the older, Victorian bulk of the Semiramis, where they would stay. They sped across a bridge, entered a plaza full of honking horns and speeding cars, then moved to the comparative quiet of a street along the Nile embankment to the hotel.
Uniformed attendants came running for their bags. The group entered the lobby, and Rick looked around with interest.
The Semiramis was big, with lofty ceilings and chandeliers. The walls were decorated with scrolls and tapestries. The rugs had once been red. There was a kind of eighteenth-century grandeur about it, even though it had turned a little shabby over the years.
The formalities of registration were completed, then the Americans went to the cashier and exchanged dollars for Egyptian pounds and coins in units called piastres. They carefully put away their receipts for the exchange, since currency control in the country was strict.
"Go ahead," Winston told the boys. "Farid and Kerama will come with me. I want to start talking over this interesting problem of theirs, and I imagine you want to rest."
Rick did not feel in the least like resting, but made no comment. He and Scotty got into a tiny, ornate elevator cage with walls of gilded-iron lattice. There wasn't room for the porters with their bags; they ran up the stairs while the boys rode with the smiling elevator operator. It wasn't a fast ride.
"Climbing rate, one hundred feet per minute," Scotty said. Rick grinned.
They were let off at the third floor, and weren't in the least surprised to find the porters waiting for them. They followed the men into a room that made them stop short with amazement.
The entrance to the hotel and the lobby had been big, but the room was enormous, spacious, and very tastefully furnished, European style.
"As big as Grand Central Station!" Scotty exclaimed.
Rick echoed, "We'll rattle around in here like a pair of pebbles in a fifty-gallon tank."
The bath was larger than most American hotel rooms, with a twenty-foot ceiling, and the closet would easily have accommodated a king's wardrobe. Rick thought that maybe it had, in times past.
He tipped the porters and closed the door behind them, then motioned to Scotty. "Go on down to the other end of the room and shout. I want to see if I can hear you."
Scotty started to oblige, grinning, then turned and called, "Come look at this view!" He had discovered that the French doors at the front of the room opened onto a tiny balcony that overlooked the Nile.
The great river was only the width of a narrow street away. Sailing gracefully along with brown sail set was a Nile boat. The bridge they
