The man whose undercover name was Anton, landed at Gibraltar in a BEA roco-jet, passed quickly through customs and immigration with his Commonwealth passport and made his way into town. He checked with a Bobby and found that he had a two-hour wait until the Mons Capa ferry left for Tangier, and spent the time wandering up and down Main Street, staring into the Indian shops with their tax-free cameras from Common Europe, textiles from England, optical equipment from Japan, and cheap souvenirs from everywhere. Gibraltar, the tourist's shopping paradise. The trip between Gibraltar and Tangier takes approximately two hours. If you've never made it before, you stand on deck and watch Spain recede behind you, and Africa loom closer. This was where Hercules supposedly threw up his Pillars, Gibraltar being the one on the European shore. Those who have made the trip again and again, sit down in the bar and enjoy the tax-free prices. The man named Anton stood on the deck. He was African by birth, but he'd never been to Morocco before. When he landed, he made the initial error of expecting the local citizenry to speak Arabic. They didn't. Rif, a Berber tongue, was the first language. The man called Anton had to speak French to make known his needs. He took a Chico cab up from the port to the El Minza hotel, immediately off the Plaza de France, the main square of the European section. At the hotel entrance were two jet-black doormen attired in a pseudo-Moroccan costume of red fez, voluminous pants and yellow barusha slippers. They made no note of his complexion, there is no color bar in the Islamic world. He had reservations at the desk. He left his passport there to go through the standard routine, including being checked by the police, had his bag sent up to his room and, a few minutes later, hands nonchalantly in pockets, strolled along the Rue de Liberté toward the casbah area of the medina. Up from the native section of town streamed hordes of costumed Rifs, Arabs, Berbers of a dozen tribes, even an occasional Blue Man. At least half the women still wore the haik and veil, half the men the burnoose. Africa changes slowly, the man called Anton admitted to himself all over again--so slowly. [Illustration] Down from the European section, which could have been a Californian city, filtered every nation of the West, from every section of Common Europe, the Americas, the Soviet Complex. If any city in the world is a melting pot, it is Tangier, where Africa meets Europe and where East meets West. He passed through the teaming Grand Zocco market, and through the gates of the old city. He took Rue Singhalese, the only street in the medina wide enough to accommodate a vehicle and went almost as far as the Zocco Chico, once considered the most notorious square in the world.