In this same year 1520, during the expedition of Sequeira to the Red Sea, Chrisna-rao king of Bisnagar collected together a vast army of 35,000 horse, 733,000 foot, and 686 armed elephants, each of which carried a castle on its back with four men. In this army there were 12,000 water-bearers, that all might be supplied without any being under the necessity of dispersing to seek for it. The baggage was immense and the followers numberless, among whom were above 20,000 common women. This prodigious army was collected for the purpose of taking the city of Rachol then under the power of Adel Khan king of Visiapour, but which had belonged to the ancestors of Chrisna-rao, who had left it in charge to their successors to attempt its recovery. The city of Rachol was naturally almost impregnable, being situated on a high mountain and fortified by several stone walls, with large deep ditches and strong towers, well stored with artillery and other means of defence, and having a garrison of 400 horse, 8000 foot, 20 elephants, and a sufficient quantity of provisions and ammunition to tire out the most patient besiegers. Chrisna-rao encamped his vast army around the city, to which he gave many fruitless assaults during three months. At length Adel Khan approached to relieve the siege, having an army of 18,000 horse, 120,000 foot, 150 elephants, and many large pieces of cannon. After many skirmishes, the two armies at last joined battle, in which at the beginning Chrisna-rao received much damage; but rallying his innumerable forces, made such havoc among the troops of Adel Khan, that only those escaped from the sword or from captivity who at last moved pity even in their enemies. Besides great riches in the camp of Adel Khan, the victor got 100 elephants, 4000 horses, 400 large cannons, and a great many small ones. Adel Khan made his escape on an elephant; but forty Portuguese who served in his army were all slain after behaving themselves with great valour.

After this great victory, Chrisna-rao resumed the siege of Rachol, but was unable to make any impression on its walls. At this tine one Christopher de Figueredo came to his camp, attended by twenty other Portuguese, bringing some Arabian horses for sale to the king. In discourse with Chrisna-rao respecting the siege, Figueredo asked permission to view the place, and to try what he could do with his Portuguese, which was granted. Figueredo gave two assaults, and being seconded in the latter by the troops of Chrisna-rao, he gained possession of the place. Soon afterwards, Adel Khan sent an embassy to Chrisna-rao, begging the restoration of the prisoners and plunder which had been taken in the late battle and in the captured city. Chrisna-rao offered to restore the whole, on condition that Adel Khan would acknowledge his supreme authority, as emperor of Canara, and come to kiss, his foot in token of submission and vassalage. This degrading condition was accepted, but its performance was prevented by several accidents. In the mean while, however, Ruy de Melo, who commanded in Goa, taking advantage of the declining situation of the affairs of Adel Khan, possessed himself of those parts of the continent adjoining to the Isle of Goa, with a force only of 250 horse and 800 Canara foot.

In the same year 1520, Lope de Brito went to succeed Juan de Sylveira in the command of the fort of Columbo in Ceylon, and carried with him 400 soldiers and many workmen, by whose means he made the fort so strong that it raised the jealousy of the natives of Columbo, who at the instigation of the Moors gave over trade with the Portuguese, and besieged the fort for five months, during which the garrison suffered great hardships. At length Antonio de Lemos arrived with a reinforcement of fifty men; with which small additional force Brito ventured to attack the vast multitude of the enemy, whom he completely routed, and matters were immediately restored to their former quiet.

On the change of the monsoon, Sequeira set sail from Ormuz and joined Albuquerque at Muscat, where he found one ship from Lisbon of nine that sailed together, but all the rest came safe afterwards. One of the ships of this fleet, while sailing before the wind beyond the Cape of Good Hope, was stopped all of a sudden. On examining into the cause, it appeared that a sea monster bore the ship on its back, the tail appearing about the rudder and the head at the boltsprit, spouting up streams of water. It was removed by exorcisms, no human means being thought sufficient. By the sailors it was called the Sambrero, or the hat-fish, as the head has some resemblance to a hat. A similar fish, though less, had been seen on the coast of Portugal near Atouguia, where it did much harm.

As the king had sent orders to the governor to build forts at the Moluccas, Sumatra, Maldive, Chaul, and Diu, Sequeira determined upon attempting the last first. Having dispatched the homeward ships from Cochin, he collected a fleet of 48 vessels of various kinds and sizes, on board of which he embarked 3000 Portuguese and 800 Malabars and Canarins. With this great force he appeared before Diu on the 9th of February 1521. Malek Azz, being suspicious that this armament was destined against him, had fortified and intrenched the city with great care. At the arrival of the Portuguese, Malek Azz was at the court of Cambaya, but had left his son Malek Saca with a strong garrison and three experienced commanders. Observing the strength of the place, Sequeira called a council of war to consult upon what was proper to be done, when it was concluded to desist from the enterprise. The officers of the fleet, though they had all concurred in this decision, and even privately allowed its prudence and necessity, accused the governor of cowardice on this occasion, though his valour was well known. Sequeira accordingly retired to Ormuz for the winter, sending Alexius de Menezes to Cochin with full power to conduct the government during his absence, and several of the other captains went to different ports to trade. Menezes dispatched the homeward trade from Cochin, and sent other ships to various parts of India, some of which went to Sumatra.

The island of Sumatra extends in length from the north-west to the south-east, for about 220 leagues, by 70 in its greatest breadth, and is cut nearly in two equal parts by the equinoctial line. It is separated from Malacca by a narrow strait, and its most southern point is parted from Java by one still narrower. Java is above 100 leagues long by twelve in breadth. To the east of Sumatra is the great island of Borneo, through which likewise the equinoctial passes, leaving two-thirds of the island on the north side of the line. The maritime parts of Sumatra are flat, but the interior is full of mountains, pervaded by many large rivers, and covered by impenetrable woods which even the rays of the sun are unable to pierce. Owing to these circumstances Sumatra is very unhealthy, yet is much resorted to for its rich and valuable productions, and particularly on account of its abounding in gold. Besides gold, it produces white sandal-wood, benzoin, camphor, pepper, ginger, cinnamon152, abundance of silk, and abounds in fish and cattle. It has in one part a spring of petroleum or rock oil, and one of its mountains is a volcano. The original natives of the island are pagans; but the Moors who came there first as merchants, have possessed themselves of the island as lords ever since the year 1400. Among the inland tribes is one called Batas, who are of most brutal manners, and even feed on human flesh. The Moors who dwell on the coast, use several languages, but chiefly the Malay. Their weapons are poisoned arrows like the natives of Java from whom they are descended, but they likewise use fire-arms. This island is divided into nine kingdoms; of which Pedier was once the chief; but now that of Pacem or Pisang is the most powerful, yet its kings only continue to reign so long as it pleases the rabble.