His tendency, after taking his bachelor's degree, was towards science; he was ambitious to enter the École polytechnique, and joined the special mathematics class. Even when very young he had shown particular aptitude for mechanics, and a gift for invention which we have seen exercised in his practical jokes as a student. When he was only four or five years old he constructed a bed out of paper, which he raised by means of cords and pulleys.

"He passed whole hours," says his Stanislas classmate, Lieutenant Constantin, "in trying to solve a mathematical problem, or studying some question which had interested him, without knowing what went on around him; but as soon as he had solved his problem, or learned something new, he was satisfied and returned to the present. He was particularly interested in everything connected with the sciences. His greatest pleasure was to make experiments in physics or chemistry: he tried everything which his imagination suggested. Once he happened to produce a detonating mixture which made a formidable explosion, but nothing was broken except a few windows."

His choice of reading revealed the same tendency. He was not fond of reading, and only liked books of adventure which were food for his warlike sentiments and his ideas of honor and honesty. He preferred the works of Major Driant, and re-read them even during his mathematical year. Returning from a walk one Thursday evening, he knocked on the prefect's door to ask for a book. He wanted La Guerre fatale, La Guerre de Demain, L'Aviateur du Pacifique, etc. "But you have already read them." "That does not matter." Did he really re-read them? His dreams were always the same, and his eyes looked into the future.

Somebody, however, was to exert over this impressionable, mobile, almost too ardent nature, an influence which was to determine its direction. His father had advised him to choose his friends with care, and not yield himself to the first comer. He was not only incapable of doing that, but equally incapable of yielding himself to anybody. Do we really choose our friends in early life? We only know our friends by finding them in our lives when we need them. They are there, but we have not sought them. A similarity of taste, of sensibility, of ambitions draw us to them, and they have been our friends a long time already before we perceive that they are not merely comrades. Thus Jean Krebs became the constant companion of Georges Guynemer. The father of Jean Krebs is that Colonel Krebs whose name is connected with the first progress made in aërostation and aviation. He was then director of the Panhard factories, and his two sons were students at Stanislas. Jean, the elder, was Guynemer's classmate. He was a silent, self-centered, thoughtful student, calm in speech and facial expression, never speaking one word louder than another, and the farthest possible removed from anything noisy or agitated. Georges broke in upon his solitude and attached himself to him, while Krebs endured, smiled, and accepted, and they became allies. It was Krebs, for the time, who was the authority, the one who had prestige and wore the halo. Why, he knew what an automobile was, and one Sunday he took his friend Georges to Ivry and taught him how to drive. He taught him every technical thing he knew. Georges launched with all his energy into this new career, and soon became acquainted with every motor in existence. During the school promenades, if the column of pupils walked up or down the Champs Elysées, he told them the names of passing automobiles: "That's a Lorraine. There is a Panhard. This one has so many horsepower," etc. Woe to any who ventured to contradict him. He looked the insolent one up and down, and crushed him with a word.

He was overjoyed when the college organized Thursday afternoon visits to factories. He chose his companions in advance, sometimes compelling them to give up a game of tennis. Krebs was one of them. For Georges the visits to the Puteaux and Dion-Bouton factories were a feast of which he was often to speak later. He went, not as a sightseer, but as a connoisseur. He could not bring himself to remain with the engineer who showed the party through the works. He required more liberty, more time to investigate everything for himself, to see and touch everything. The smallest detail interested him; he questioned the workmen, asking them the use of some screw, and a thousand other things. The visit was too soon over for him; and when his comrades had already left, and the division prefect was calling the roll to make sure of all his boys, Guynemer as usual was missing, and was discovered standing in ecstasy before a machine which some workmen were engaged in setting up.

"The opening weeks of the automobile and aviation exhibition were a period of comparative tranquillity for his masters, as Guynemer was no longer the same restless, nervous, mischievous boy, being too anxious to retain his privileges for the promenades. He was always one of those who haunted the prefect when the hour for departure drew near. He was impatient to know where they were to go: 'Where are we going?... Shall you take us to the Grand Palais? (The Automobile and Aviation Exhibition).... Wouldn't you be a brick!...' When they arrived, he was not one of those many curious people who circulate aimlessly around the stands with their hands in their pockets, without reaping anything but fatigue, like a cyclist on a circular track. His plans were all made in advance, and he knew where the stand was which he meant to visit. He went directly there, where his ardor and his free and easy behavior drew upon him the admonitions of the proprietor. But nothing stopped him, and he continued to touch everything, furnishing explanations to his companions. When he returned to the college his pockets bulged with prospectuses, catalogues, and selected brochures, which he carefully added to the heterogeneous contents of his desk."[11]

[11] Unpublished notes by Abbé Chesnais.

Jean Krebs crystallized Georges Guynemer's vocation. He developed and specialized his taste for mechanics, separating it from vague abstractions and guiding it towards material realities and the wider experiences these procure. He deserves to be mentioned in any biography of Guynemer, and before passing on, it is proper that his premature loss should be cited and deplored. Highly esteemed as an aviator during the war, he made the best use of his substantial and reliable faculties in the work of observation. Airplane chasing did not attract him, but he knew how to use his eyes. He was killed in a landing accident at a time almost coincident with the disappearance of Guynemer. One of his escadrille mates described him thus: "With remarkable intelligence, and a perfectly even disposition, his chiefs valued him for his sang-froid, his quick eye, his exact knowledge of the services he was able to perform. Every time a mission was intrusted to him, everybody was sure that he would accomplish it, no matter what conditions he had to meet. He often had to face enemy airplanes better armed than his own, and in the course of a flight had been wounded in the thigh by an exploding shell. Nevertheless he had continued to fly, only returning considerably later when his task was done. His death has left a great void in this escadrille. Men like him are difficult to replace...."

Thus the immoderate Guynemer had for his first friend a comrade who knew exactly his own limits. Guynemer could save Jean Krebs from his excess of literal honesty by showing him the enchantment of his own ecstasies, but Jean Krebs furnished the motor for Guynemer's ambitious young wings. Without the technical lessons of Jean Krebs, could Guynemer later have got into the aviation field at Pau, and won so easily his diploma as pilot? Would he have applied himself so closely to the study of his tools and the perfecting of his machine?

The war was to make them both aviators, and both of them fell from the sky, one in the fullness of glory, the other almost obscure. When they talked together on school outings, or as they walked along beside the walls of Stanislas, had they ever foreseen this destiny? Certainly not Jean Krebs, with his positive spirit; he only saw ahead the École polytechnique, and thought of nothing but preparation for that. But Guynemer? In his very precious notes, Abbé Chesnais shows us the boy constructing a little airplane of cloth, the motor of which was a bundle of elastics. "At the next recreation hour, he went up to the dormitory, opened a window, launched his machine, and presided over its evolutions above the heads of his comrades." But these were only the games of an ingenious collegian. The worthy priest, who was division prefect, and watched the boy with a profound knowledge of psychology, never received any confidence from him regarding his vocation.