leaving several children by his wife,
Isabel, a daughter of John de Warenne, earl of Surrey (d. 1304).

See _Documents and Records illustrating the History of Scotland_, edited by
F. T. Palgrave (London, 1837); _Documents illustrative of the History of
Scotland_, 1286-1306, edited by J. Stevenson (Edinburgh, 1870), J. H.
Burton, _History of Scotland_, vol. ii. (Edinburgh, 1905); A. Lang,
_History of Scotland_, vol. i. (Edinburgh, 1904); Sir H. Maxwell, _Robert
the Bruce_ (London, 1897); _Calendar of Documents relating to Scotland_,
edited by J. Bain (Edinburgh, 1881-1888). Also SCOTLAND: _History_.

BALIUAG, a town of the province of Bulacan, Luzon, Philippine Islands, on
the Quingua river, 29 m. (by rail) N.N.W. of Manila. Pop. (1903) 21,008,
including the population (7072) of Bustos, which was annexed to Baliuag in
that year after the census was taken. Baliuag is served by an extension of
the railway between Manila and Dagupan. It is the trade centre of a fertile
agricultural district, and manufactures bamboo hats, silk and native fibre
goods.

BALKAN PENINSULA, the most easterly of the three large peninsulas which
form the southern extremities of the European continent. Its area, 184,779
sq. m., is about 35,000 sq. m. less than that of the Iberian Peninsula, but
more than twice that of the Italian. Its northern boundary stretches from
the Kilia mouth of the Danube to the Adriatic Sea near Fiume, and is
generally regarded as marked by the courses of the rivers Danube, Save and
Kulpa. On the E. it is bounded by the Black Sea, the Sea of Marmora, and
the Aegean; on the S. by the Mediterranean; on the W. by the Ionian Sea and
the Adriatic. With the exception of the Black Sea coast and the Albanian
littoral, its shores are considerably indented and flanked by groups of
islands. The Peninsula in its general contour resembles an inverted pyramid
or triangle, terminating at its apex in a subsidiary peninsula, the
Peloponnesus or Morea. Its surface is almost entirely mountainous, the only
extensive plains being those formed by the valleys of the Danube and
Maritza, and the basin of Thessaly drained by the Salambria (ancient
_Peneus_). The Danubian plain, lying, for the most part, outside the
Peninsula, is enclosed, on the north, by the Carpathians; and on the south
by the Balkans, from which the Peninsula derives its name. These ranges
form together the great semicircular mountain-chain, known as the
anti-Dacian system, thr