ominique François Arago was born February 26th, 1786, near Perpignan, in the Eastern Pyrenees, where his father held the position of Treasurer of the Mint. He entered the École Polytechnique in Paris after a brilliant examination, and held the first places throughout the course. In 1806 he was sent to Valencia in Spain, and to the neighboring island of Iviza, to make the astronomical observations for prolonging the arc of the meridian from Dunkirk southward, in order to supply the basis for the metric system.
Here begin his extraordinary adventures, which are told with inimitable spirit and vigor in his 'Autobiography.' Arago's work required him to occupy stations on the summits of the highest peaks in the mountains of southeastern Spain. The peasants were densely ignorant and hostile to all foreigners, so that an escort of troops was required in many of his journeys. At some stations he made friends of the bandits of the neighborhood, and carried on his observations under their protection, as it were. In 1807 the tribunal of the Inquisition existed in Valencia; and Arago was witness to the trial and punishment of a pretended sorceress,--and this, as he says, in one of the principal towns of Spain, the seat of a celebrated university. Yet the worst criminals lived unmolested in the cathedrals, for the "right of asylum" was still in force. His geodetic observations were mysteries to the inhabitants, and his signals on the mountain top were believed to be part of the work of a French spy. Just at this time hostilities broke out between France and Spain, and the astronomer was obliged to flee disguised as a Majorcan peasant, carrying his precious papers with him. His knowledge of the Majorcan language saved him, and he reached a Spanish prison with only a slight wound from a dagger. It is the first recorded instance, he says, of a fugitive flying to a dungeon for safety. In this prison, under the care of Spanish officers, Arago found sufficient occupation in calculating observations which he had made; in reading the accounts in the Spanish journals of his own execution at Valencia; and in listening to rumors that it was proposed (by a Spanish monk) to do away with the French prisoner by poisoning his food.
The Spanish officer in charge of the prisoners was induced to connive at the escape of Arago and M. Berthémie (an aide-de-camp of Napoleon); and on the 28th of July, 1808, they stole away from the coast of Spain in a small boat with three sailors, and arrived at Algiers on the 3d of August. Here the French consul procured them two false passports, which transformed the Frenchmen into strolling merchants from Schwekat and Leoben. They boarded an Algerian vessel and set off. Let Arago describe the crew and cargo:--
"The vessel belonged to the Emir of Seca. The commander was a Greek captain named Spiro Calligero. Among the passengers were five members of the family superseded by the Bakri as kings of the Jews; two Maroccan ostrich-feather merchants; Captain Krog from Bergen in Norway; two lions sent by the Dey of Algiers as presents to the Emperor Napoleon; and a great number of monkeys."
As they entered the Golfe du Lion their ship was captured by a Spanish corsair and taken to Rosas. Worst of all, a former Spanish servant of Arago's--Pablo--was a sailor in the corsair's crew! At Rosas the prisoners were brought before an officer for interrogation. It was now Arago's turn. The officer begins:--
"'Who are you?'
"'A poor traveling merchant.'
"'From whence do you come?'