THE INVASION OF BULGARIA.

BRITISH CROSS FRONTIER.

On Wednesday Southern Bulgaria was invaded by the British forces, which during the last few days have been moving north in pursuit of the Second Bulgarian Army from the Lake Doiran region. Yesterday afternoon the War Office issued the following laconic telegram from the British front in Macedonia: Yesterday British troops entered Bulgaria opposite Kosturino. At seven p.m. the following further telegram was issued by the War Office: Our cavalry and infantry continue their advance into Bulgaria. British and Greek troops are advancing up the steep Belashitza range. The Greeks are approaching the crest of the mountains north of Lake Doiran, and our troops in the centre have reached Dzumaaobasi Kosturino is just across the Bulgarian frontier, about five miles south of the town of Strumitza (or Strumnitza). It lies in a gap which runs to the west of Belashitza range of mountains, forming the southern frontier of Bulgaria at this sector, and is on the only road leading northward to Strumitza, which is a few miles inside the boundary. On this road the Second Army is retreating, closely pursued by the Allies. From Strumitza the load runs northwest to Ishtip (35 miles) and Veles, otherwise called Kuprulu (another 20 miles). To the north-east of Strumitza the country is very mountainous and difficult, with very inferior tracks.