From “India: A History” by John Keay
On the coast, the Europeans came and went. From their port of Bassein the Portuguese had acquired an adjacent trickle of islands which afforded good shelter for their shipping. Amongst the coconut groves on one of the islands they had built a small fort. They called it Bon Bahia, or Bombay. In the 1660s, following an Anglo – Portuguese alliance against their Dutch rivals, the place was transferred to Charles II as part of his Portuguese wife’s dowry. Although Bombay itself was as yet of no commercial value, the English thus acquired a territorial toehold adjacent to the busy shipping lanes of the west coast.