DERG, LOUGH, a lake of Ireland, on the boundary of the counties Galway, Clare and Tipperary. It is an expansion of the Shannon channel, 23 m. long and from 1 to 3 m. broad. The water appears to be dammed, as the Shannon flowing over the low lying central plain breaks through the narrow gorge between Slieve Bernagh and the Arra mountains. Ruined churches and fort resses are numerous on the eastern shore, and on Iniscaltra island are a round tower and the remains of five churches.
Another LOUGH DERG, near Pettigo in Donegal, is famous as the traditional scene of St. Patrick's purgatory. In the middle ages its pilgrimages had a European reputation, and they are still observed. The hospice, chapels, etc., are on Station island, and there is a ruined monastery on Saints' island.
a city of south-western Louisiana, U.S.A., on the watershed between the Sabine and the Calcasieu rivers ; the capital of Beauregard parish. It is on Federal highway 171, and is served by the Santa Fe, the Kansas City Southern and the Southern Pacific railways. The population was 3,535 in 1920 (22% negro) and was 3,747 in 193o by the Federal census. It was founded in 190o as a pine-milling centre, and with the decline of that industry (about 192o) a study of the agricultural possi bilities of the region was made, and the cultivation of satsuma oranges, grapefruit and lemons was introduced. By 1927 there were 40o,o0o citrus trees growing in the vicinity, of which 2 5,000 were already bearing full crops. De Ridder was organized as a city in 1912. It has a commission form of government.
(1765 1844), marshal of France, was born at Reims on July 29, 1765. He entered the army as a private soldier in 178 2, did good service in the campaigns of the revolutionary wars, and in 1799 attained the rank of general of brigade. He served in Switzerland under Massena (1799), at Hohenlinden under Moreau (1800), at Jena (18o6), and at Friedland (1807). After this last battle he was created count d'Erlon and received a pension. For the next six years d'Erlon was almost continuously engaged as commander of an army corps in the Peninsular War. At the pass of Maya in the Pyrenees he defeated (1814) Lord Hill's troops. After the first Restoration he was named commander of the i6th military di vision, but was arrested for conspiring with the Orleans party. He escaped, and joined Napoleon on his return from Elba. The em peror made him a peer of France, and gave him command of the I. army corps. In the Waterloo campaign d'Erlon's corps formed part of Ney's command on June 16, but, in consequence of an extraordinary series of misunderstandings, took part neither at Ligny nor at Quatre Bras (see WATERLOO CAMPAIGN) .
He was in command of the right wing of the French army throughout the great battle of June 18 and fought in the closing operations around Paris. At the second Restoration D'Erlon fled into Germany, only returning to France after the amnesty of 1825. He was reinstated on the accession of Louis Philippe. As com mander of the I2th military division (Nantes), he suppressed the legitimist agitation in his district and caused the arrest of the duchess of Berry (1832). He was governor of Algeria from
to 1836. D'Erlon was made marshal of France shortly before his death in Paris on Jan. 25,
