The boundary between the Cholas and the Western Chalukyas was as always the Tungabhadra river. The hold over Vengi was quite firm, and Dakkina Kosala (south-west Kalinga) and some parts of Kalinga (proper) including the capital Kalinganagara, the modern Mukhalingam in the Srikakulam district, was under the Chola rule. Port Quilon, on the Malabar Coast, was recovered by prince Vikrama Chola sometime between c. 1102 and c. 1118 CE. Towards the end of Kulottunga's reign, when his son Vikrama Chola, the viceroy of Vengi left south for the latter's coronation, the northern half of the Vengi kingdom seems to have slipped from his hands and gone to the Western Chalukyan empire under Vikramaditya VI. According to some historians, during this period, Kulottunga also lost the province of Gangavadi, the province of the Western Gangas, to Hoysala Vishnuvardhana. The latter seems to have attacked and defeated the Chola Viceroy, Adigaiman, the controller of the Kongu and Kannada country. Administration Kulottunga's capital was Gangaikondacholapuram. Kanchi was next in importance and had a palace and an "abhisheka mandapam" (royal bathing hall) from where the king issued many of his charters. The king's inscriptions speak of a highly organized form of fiscal and local administration. He carried out a massive land survey which formed the basis for taxation. He promoted free trade by abolishing tolls or transit duties and came to be known as "Sungamtavirrton", that is, "one who abolished tolls". Kulottunga did away with the old system of appointing Chola-Pandya viceroys in the southern territories. The king, instead built military cantonments that were in charge of protecting his interests and collecting tribute, but did not interfere with the internal administration of the conquered territories, a responsibility which he left to the native chiefs and feudatories. Kulottunga was ably assisted in his campaigns and internal administration by his officials some of whom were; Karunakara Tondaiman, described as the minister and warrior of Abhaya; Solakon who distinguished himself in the campaigns in the west against the Kongas, Gangas and Mahrattas; the Brahmin Kannan of great fortress; Vanan (possibly the Bana Vanakovaraiyan also called Suttamallan Mudikondan) who is said to be dexterous in the use of his beautiful bow in battle; the general Naralokaviran alias Kalingar-kon who distinguished himself in the Pandya and south Kerala wars; Kadava: Vailava, the lord of Chedi (Malayaman) country; Senapati (General) Anantapala; the Irungovel chieftain, Adavallan Gangaikonda Cholan alias Irungolan; the