As his name indicates, Petrella is the offspring of different nationalities. His father, Lieutenant of Police Gregorio Petrella, was in the Spanish equivalent of England's
Special Branch when he met Petrella's British mother, Mirabel Trentham-Foster, in front of the pyramids in Egypt. Lieutenant Petrella, whose primary job was to prevent Spain's dictator,
Francisco Franco, from assassination, spoke a number of languages and was often sent abroad to investigate possible conspiracies against Franco. On one of these missions he met Miss Trentham-Foster, who was sketching the pyramids. She was the daughter of an English architect and the granddaughter of a judge "who was also an accomplished painter." Patrick spent the first seven years of his life running around with great freedom with other Spanish boys his own age. On his eighth birthday, however, his mother "put her small foot down" and began the process that would launch him "into the traditional educational system of the English middle and upper class." So he spent the next nine years at English boarding schools. At the age of 17 his father, by now a Colonel, sent him to the American University in Beirut, where he learned to speak Arabic, then to another "rather peculiar" one in Cairo, where, among other things, he learned to pick locks. His ambition had always been to be a policeman; on his 21st birthday he joined the Metropolitan Police as a Constable. After training, he was first posted to the North London Division of Highside. Bilingual in English and Spanish, Petrella speaks at least three other languages: Arabic; German; and French at least well enough to pass for a Belgian when in France. In
Young Petrella he says to a fellow policeman: "I speak French better than Spanish... We all moved to Bordeaux when I was six. That's a good age for picking up a language, because you don't forget it again easily." This contradicts other information about his early life from other sources, so it may be that he was not being entirely factual about it. In "Petrella's Holiday" we learn something about his appearance: a saleslady who describes him with "an accuracy which suggested she had looked at him more than once" says he has "Dark black hair, young-looking, a brown face, very deep blue eyes." In the 1964 story "The Man Who Hated Banks" he is in Germany on a job and at one point speaks "impeccable German". During the course of that investigation he has a young and attractive clerical assistant named Jane Orfrey who turns out to be the niece of the Assistant Commissioner—and in the last paragraph their engagement is announced. They later have a son named Donald. == Character ==