At all events, Belisarius lived an upright and regular life, and in these years only failed on one expedition: that was against Porphyry, the famous whale, who now for twenty-five years had harassed the shipping of the Bosphorus and Black Sea, and could not by any means be killed or trapped. This Porphyry was the only whale that was ever known to enter the Mediterranean Sea. Much larger whales, called sperm whales, are frequently met in the Atlantic, and one of great size was once stranded at Cadiz. Larger still are met with in the Indian Ocean by Red Sea traders, who sail to Ceylon every year with the monsoon-wind – these are the whales that yield whalebone, and are often 400 feet in length. Porphyry was no more than one-eighth of that size; but unlike the Indian whales, who are shy creatures and avoid shipping, he carried on a destructive war with the Empire. Whales do not, as one might suppose, cat large fish and dolphins and seals and sharks, but only the smallest fry: they rush through the water with their mouths open and engulf millions at a time. Porphyry would cruise about in the Black Sea, feeding on the sea-bottom in the breeding grounds offish, and sometimes would disappear for months on end. But always he would return and station himself in the narrows of the Bosphorus, or the Hellespont, and let swarms offish be swept into his mouth by the current. It happened at Porphyry's first appearance that a bold fisherman, annoyed at having his nets broken, managed as he shot by in a small boat to throw a heavy fish-spear into Porphyry's flank. This was a formal declaration of war, and Porphyry, whose intentions had hitherto been peaceable enough, charging after the boat, broke it with a swing of his tail. Then it was realized that Porphyry was not a young whale of the usual unwarlike sort but a full-grown killer-whale, as they are called, such as have been observed by sailors on the Indian voyage in the act of making war on the great whales and flogging them to pieces with repeated blows.
Porphyry would lurk in the depths of the sea and suddenly appear, spouting water from a hole in his head, and dash at any boat or small ship he saw, and strike at it with his tail, and destroy it. He also sank two ships of considerable tonnage, at different times, by rising suddenly from beneath them and starting their timbers with the impact of his head against them. This was perhaps an accident, however.
All sorts of explanations were given for Porphyry's ravages. The Orthodox held that he was sent as a punishment for the heretical sin of Monophysitism, but the Monophysites said that this could not be so, for Porphyry struck at Orthodox and Monophysitcs alike. (And by the time of which I speak the breach with Rome had been repaired.) Others said that he was looking for a Jonah – and many an unpopular sailor, Orthodox or Monophysite as the case might be, had been thrown out to him as a sacrifice. Bishops of both opinions had been sent to preach to him from the shore, and texts floated down the current to him, written on strips of paper, conjuring him in the name of the Trinity to return to the Ocean whence he came. But Porphyry was unlettered and unbaptized, and paid no attention.
Belisarius volunteered to hunt Porphyry. He stationed himself at the entrance of the Black Sea about the time that the whale was expected to return to its usual fishing grounds. He was in a ship of a size greater than Porphyry was accustomed to attack, and it was armed with a siege-catapult of the sort that throws not the usual short bolt with wooden feathers, but a heavy, long spear. Justinian provided, for the management of the catapult, a detachment of City militia of the Blue faction – the responsibility for the defence of the walls of Constantinople was divided between the Demarch of the Blues and the Dc-march of the Greens – who were animated by a desire to earn glory for their Colour by the extinction of Porphyry. The ship's crew were also Blues. They painted the catapult spears with blue paint, and painted the checks of the vessel blue too, and the blades of the oars.
