Girl by a gate — in old San Juan IME STANDS STILL in this Puerto Rican patio. That weathered escutcheon bears the Royal Arms T of Spain. You might have stepped back three centuries. In a sense, you have. You start to wonder. Can this really be the Puerto Rico everybody is talking about? Is this the island where American industry is now expanding at the rate of three new plants a week? Is this truly the scene of a twentiethcentury renaissance? Ask any proud Puerto Rican. He will surely answer—yes.