After that he wrote off to various well-known bookshops, using a false name and a forwarding address in Praed Street, Paddington, and acquired the necessary reference books by post. These he scoured until the small hours each morning in his flat, building up in his mind a most detailed picture of the incumbent of the Elysee Palace from his boyhood until the time of reading. Much of the information he gleaned was of no practical use, but here and there a quirk or character trait would emerge that he noted in a small exercise book. Most instructive concerning the character of the French President was the volume of the General's memoirs, The Edge of the Sword (Le Fil de I'Epee) in which Charles de Gaulle was at his most illuminating about his own personal attitude to life, his country and his destiny as he saw it.
The Jackal was neither a slow nor stupid man. He read voraciously and planned meticulously, and possessed the faculty to store in his mind an enormous amount of factual information on the off-chance that he might later have a use for it.
But although his reading of the works of Charles de Gaulle, and the books about him by the men who knew him best, provided a full picture of a proud and disdainful President of France, it still did not solve the main question that had been baffling him since he accepted in Rodin's bedroom in Vienna on June 15th the assignment to go through with the assassination. By the end of the first week in July be had still not worked out the answer to this question-when, where and how should the «hit' take place? As a last resort he went down to the reading room of the British Museum and, after signing his application for permission to research with his habitual false name, started to work his way through the back copies of France's leading daffy newspaper Le Figaro.
Just when the answer came to him is not exactly known, but it is fair to presume it was within three days from July 7th. Within those three days, starting with the germ of an idea triggered by a columnist writing in 1962, cross-checking back through the files covering every year of De Gaulle's presidency since 1945, the assassin managed to answer his own question. He decided within that time precisely on what day, come illness or bad weather, totally regardless of any considerations of personal danger, Charles de Gaulle would stand up publicly and show himself. From that point on, the Jackal's preparations moved out of the research stage and into that of practical planning.
'It took long hours of thought, lying on his back in his flat staring up at the team-painted ceiling and chain-smoking his habitual king size filter cigarettes, before the last detail had clicked into place.
At least a dozen ideas were considered and rejected before he finally hit on the plan he decided to adopt, the «how' that had to be added to the «when' and «where' that he had already decided.
The jackal was perfectly aware that in 1963 General de Gaulle was not only the President of France; he was also the most closely and skilfully guarded figure in the Western world. To assassinate him, as was later proved, was considerably more difficult than to kill President John F. Kennedy of the United States. Although the English killer did not know it, French security experts who had through American courtesy been given an opportunity to study the precautions taken to guard the life of President Kennedy had returned somewhat disdainful of those precautions as exercised by the American Secret Service. The French experts' rejection of the American methods was later justified when in November 1963 John Kennedy was killed in Dallas by a half-crazed and security-slack amateur while Charles de Gaulle lived on, to retire in peace and eventually to die in his own home.
What the jackal did know was that the security men he was up against were at least among the best in the world, that the whole security apparatus around De Gaulle was in a state of permanent forewarning of the likelihood of some attempt being made on their charge's life, and that the organisation for which he worked was riddled with security leaks. On the credit side he could reasonably bank on his own anonymity, and on the choleric refusal of his victim to co-operate with his own security forces. On the chosen day, the pride, the stubbornness and the absolute contempt for personal danger of the French President would force him to come out into the open for a few seconds no matter what the risks involved.