GREENLAW (a "grassy hill"), a town of Berwickshire, Scotland. Pop. (1901) 611. It is situated on the Blackadder, 62-1/4 m. S.E. of Edinburgh by the North British railway company's branch line from Reston Junction to St Boswells. The town was built towards the end of the 17th century, to take the place of an older one, which stood about a mile to the S.E. It was the county town from 1696 to 1853, when for several years it shared this dignity with Duns, which, however, is now the sole capital. The chief manufactures are woollens and agricultural implements. About 3 m. to the S. the ruin of Hume Castle, founded in the 13th century, occupies a commanding site. Captured by the English in 1547, in spite of Lady Home's gallant defence, it was retaken two years afterwards, only to fall again in 1569. After its surrender to Cromwell in 1650 it gradually decayed. Towards the close of the 18th century the 3rd earl of Marchmont had the walls rebuilt out of the old stones, and the castle, though a mere shell of the original structure, is now a picturesque ruin. GREENLEAF, SIMON (1783-1853), American jurist, was born at Newburyport, Massachusetts, on the 5th of December 1783. When a child he was taken by his father to Maine, where he studied law, and in 1806 began to practise at Standish. He soon removed to Gray, where he practised for twelve years, and in 1818 removed to Portland. He was reporter of the supreme court of Maine from 1820 to 1832, and published nine volumes of _Reports of Cases in the Supreme Court of Maine_ (1822-1835). In 1833 he became Royall professor, and in 1846 succeeded Judge Joseph Story as Dane professor of law in Harvard University; in 1848 he retired from his active duties, and became professor emeritus. After being for many years president of the Massachusetts Bible Society, he died at Cambridge, Mass., on the 6th of October 1853. Greenleaf's principal work is a _Treatise on the Law of Evidence_ (3 vols., 1842-1853). He also published _A Full Collection of Cases Overruled, Denied, Doubted, or Limited in their Application, taken from American and English Reports_ (1821), and _Examination of the Testimony of the Four Evangelists by the Rules of Evidence administered in the Courts of Justice, with an account of the Trial of Jesus_ (1846; London, 1847). He revised for the American courts William Cruise's _Digest of Laws respecting Real Property_ (3 vols., 1849-1850). GREEN MONKEY, a west African representative of the typical group of the guenon monkeys technically known as _Cercopithecus callitrichus_, taking its name from the olive-greenish hue of the fur of the back, which forms a marked contrast to the white whiskers and belly.