The company had long fixed an eye on Bombay. Its position half way down the Indian seaboard gave it both strategic and commercial importance, while it lay beyond the authority of the Moguls, and so could be fortified without offending them. In 1626 the company joined with the Dutch under Van Speult in attacking Bombay, but could not retain possession. In 1661 Charles II. received Bombay from Portugal as part of the Infanta Catherine's dowry, but effective possession was not taken until 1665, and in 1668 Charles handed the island over to the company. At first the loss of life, owing to the unhealthiness of the climate, was appalling; but in spite of that fact it gradually prospered, until it reached its present position as the second port and city of India. In 1670 Gerald Aungier fortified the island, and so became the true founder of its prosperity. In 1674 a treaty was entered into with Sivaji. In 1682 Sir Josiah Child at home and Sir John Child in India formed a combination, which recognized that in the struggle between the Mogul and the Mahrattas the English must meet force with force; and in 1687 Bombay supplanted Surat as the chief seat of the English in India. The founding of Calcutta. In 1664 Shaista Khan, the brother of the empress Nur Jahan, became viceroy of Bengal, and though a strong and just ruler from the native point of view, was not favourable to the foreign traders. In 1677 the president of Madras had to warn him that unless his exactions ceased, the company would be obliged to withdraw from Bengal. In 1679 the English obtained from the Mogul emperor a firman exempting them from dues everywhere except at Surat; but Shaista Khan refused to recognize the document, and on the 14th of January 1686 the court of directors resolved to have recourse to arms to effect what they could not obtain by treaty. This was the first formal repudiation of the doctrine of unarmed traffic laid down by Sir Thomas Roe in 1616. An expedition was despatched to India consisting of six companies of infantry and ten ships under Captain Nicholson. Two of the ships with 308 soldiers arrived at the Hugli river in the autumn of 1686. At this time Job Charnock was the chief of the Bengal council, and, owing to an affray with the Mogul troops at Hugli on the 28th of October 1686, he embarked the company's goods and servants on board light vessels and dropped down the river to Sutanati, the site of the modern Calcutta. At this place, about 70 m. from the sea and accessible at high tide to heavily armed ships, the stream had scooped for itself a long deep pool, now Calcutta harbour, while the position was well chosen to make a stand against the Bengal viceroy. On the 20th of December 1686 Charnock first settled at Calcutta, but in the following February Shaista Khan despatched an army against him, and he was forced to drop farther down the river to Hijili. In June Charnock was obliged to make an honourable capitulation, and returned to Ulubaria, 16 m.