There is good reason to surmise that, at some remote period, these Islands and the Islands of Formosa and Borneo were united, and possibly also they conjointly formed a part of the Asiatic mainland. Many of the islets are mere coral reefs, and some of the larger islands are so distinctly of coral formation that, regarded together with the numerous volcanic evidences, one is induced to believe that the Philippine Archipelago is the result of a stupendous upheaval by volcanic action. [72] At least it seems apparent that no autochthonous population existed on these lands in their island form. The first settlers were probably the _Aetas,_ called also _Negritos_ and _Balugas_, who may have drifted northwards from New Guinea and have been carried by the strong currents through the San Bernadino Straits and round Punta Santiago until they reached the still waters in the neighbourhood of Corregidor Island, whilst others were carried westwards to the tranquil Sulu Sea, and travelling thence northwards would have settled on the Island of Negros. It is a fact that for over a century after the Spanish conquest, Negros Island had no other inhabitants but these mountaineers and escaped criminals from other islands.
The sturdy races inhabiting the Central Luzon highlands, decidedly superior in physique and mental capacity to the _Aetas,_ may be of Japanese origin, for shortly after the conquest by Legaspi a Spanish galley cruising off the north coast of Luzon fell in with Japanese, who probably penetrated to the interior of that island up the Rio Grande de Cagayán. Tradition tells us how the Japanese used to sail down the east coast of Luzon as far as the neighbourhood of Lamon Bay, where they landed and, descending the little rivers which flowed into the Lake of Bay, settled in that region which was called by the first Spanish conquerors Pagsanján Province, and which included the Laguna Province of to-day, with a portion of the modern Tayabas Province.
Either the Japanese extended their sphere from the Lake of Bay shore, or, as some assert (probably erroneously), shipwrecked Japanese went up the Pansipít River to the Bómbon Lake: the fact remains that Taal, with the Bómbon Lake shore, was a Japanese settlement, and even up to now the Taaleños have characteristics differing from those of the pure Malay immigrant descendants. The Philippine patriot, Dr. José Rizal, was a good Japanese-Malay type.