Martinez de la Rosa was born the 10th March, 1789, at Granada, where also he received his education, completing it at the University in that city. Before the age of twenty he had gone through the usual course of study in the ancient and some of the modern languages, in philosophy, mathematics, canon and civil law, with such success as to have been enabled to undertake a professorship of philosophy there, perfecting himself in the art of oratory, in which his natural talents already had become manifest, as they soon afterwards gave him the means of greater distinction. From those pursuits he was called away, in 1808, on the occurrence of the French invasion, to take an active part in the struggle for national independence, into which he entered with youthful ardour, by public declamations, and by writing in a periodical instituted to maintain it. As the French arms advanced victoriously, Martinez de la Rosa, with others of the party who had been most conspicuous in their opposition to them, had to take refuge in Cadiz. He was first employed to proceed to Gibraltar, as his future colleague, the Conde de Toreno, had been sent to London, to obtain a cessation of hostilities, in the war then yet existing between England and Spain, and concert measures of alliance against the French. In this mission he had the desired success, having further obtained from the governor of Gibraltar arms and ammunition, which enabled the Spanish forces under Castanios to march and obtain, at Bailen, the memorable triumph of the 19th July, 1808. In consequence of this victory, the French had to evacuate Madrid, and the Central Junta was formed, superseding the first actors in the conflict. On this, Martinez de la Rosa took advantage of the circumstances to go to England, and observe there himself, says his biographer, the celebrated Pacheco, “in its birth-place, where it was natural, complete and necessary, that representative system, which the spirit of reform wished to bring over for the people of the Continent.” Wolf says he had there a diplomatic commission, adding, that he took advantage of it “to familiarize himself with the English constitution, for which he always had a great predilection.”