Martin Frederic, a learned antiquary born at Altona in 1769. In 1798 he commenced his travels in pursuit of antiquarian lore, visiting the northern parts of Europe, and afterwards Spain, Italy, and Hungary. His peregrinations were performed entirely on foot; he frequently slept in the open air, and trusted for subsistence to the bounty of strangers. He made accurate observations on the antiquities of the countries through which he passed, and published a few memoirs; but much of his erudition, which was undoubtedly great, has perished with himself. A part of his papers and drawings were deposited in the library at Copenhagen. He died in prison at Naples in 1824.