The retort was so clever, the manner of saying it so charming, that the Abbe and Marie Antoinette exchanged glances of amusement and pride, but the little prince was unconscious of having said or done anything unusual. Besides grammar, Louis studied Italian, which he could speak and read fluently; he also studied Latin, and some of the sentences he translated have been preserved, such as "True friends are useful to princes." "I know a prince who easily flies into a passion." "Flatterers are very dangerous to princes." From these sentences it is evident that the Abbe was trying to teach his clever little scholar more than one thing at a time. Louis was also taught arithmetic, geometry and geography, this last by means of a huge hollow globe lit by a lantern, which had been invented for the special use of the Dauphin, by a celebrated professor in the University of Paris. Louis also was trained in all sorts of athletic sports and when he was seven years old was sturdy of body and far more mature of mind than many older boys. At seven, according to the court custom of France, he was obliged to be given into the care of a governor. The people wished to choose this governor and named several candidates who were utterly unworthy of the position, but they were obliged to set aside their wishes and accept a man named by the king, who also himself continued to superintend his son's education. At this time the clouds of political disaster were again hanging over the palace, and even the Dauphin could see and feel the uneasiness that surrounded him. On June 20, 1792, King Louis refused to sign two decrees which the people wished him to sign, and with his refusal the storm of riot and revolution burst forth again. An immense mob of shrieking, howling people stormed the Tuileries, where no measures had been taken in defence, and the king gave orders that the doors of the palace be flung open and the people be allowed to pass in unhindered. In a few minutes every inch of space in rooms and corridors and halls was filled with the dense crowd. Only one room was locked, and in that room were the king and queen, the Dauphin and his sister, Therese with a few loyal friends. Therese was terrified and would have screamed with fright, but the manly little Dauphin watching her, held back his own tears and kept her terror under control by his words and manner, acting with the dignity of a grown-up guardian.