MAR, Juan Manuel del (mar), Peruvian statesman, born in Cuzco in 1806; died in Lima, 15 June, 1862. He received an excellent education in his native city, and then entered the University of San Marcos, Lima, where in 1825 he became professor of philosophy, and in 1830 was graduated as doctor in law, and began to practise at, the bar. In 1832 he was appointed assessor of the superior court and was elected successively deputy to congress, judge of the supreme court, senator, and minister in all the different branches of the administration. In 1855, while secretary of war, he proposed and carried a law to annul the unjust measure by which the victorious officers of Ayacucho had been deprived of their rank, and thereby contributed to conciliate contending parties. As president of the ministry in 1856-'7, during the revolution of Vivanco, he sustained order in the capital by his energy, and during the absence of President Castilla from the republic in his invasion of Ecuador he was in charge of the executive as vice-president from September, 1859, to March, 1860. At the expiration of Castilla's term in May, 1862, when the country prepared to reward Del Mar's services by his election to the presidency, he fell sick and retired from the candidacy.