But Columbus does give quite detailed information on the coastline of Island III, more so than any other island he visited. On the evening of 16 October, he arrived at a cape where the coastlines ran NNW and SSW (though some scholars see a possible transcription error here). The following morning (17 October) he followed the coast NNW, and when he was two leagues distant from the end (or "the cape") of the island, he found a "wonderful harbor" with a small island in its mouth forming two narrow entrances. Going into the harbor with boats, he found it too shallow for use and put the boats ashore for water instead. Leaving the harbor after two hours, he then sailed northwest (rather than the previous NNW) "so far that I viewed all that part of the island as far as the coast that runs east-west". Thus there are four coastlines described at Island III: from the arrival cape, one coast runs SSW, one runs NNW; following the second coast NNW, Columbus arrived at a harbor; continuing along that coast, the coastline runs NW, and then W. These four coastlines and harbor are an essentially perfect fit with the southern part of Long Island. Columbus ran into foul weather on the night of 17–18 October and gained sea room to avoid running onto a lee shore. He returned to Island III on the 18th, but the log does not specify where on the island he anchored that night. The following morning, 19 October, he split his fleet to search for the island of Samoete that his kidnapped native guides had told him about. Island IV Leaving his Island III anchorage at dawn, Columbus sent Niña SSE and Santa María SE, while Pinta was sent "east and southeast" (contrary to the ESE mentioned in some sources). Thus the ships were able to sweep a large area of ocean in search of the island whose position was only vaguely known. The Santa María herself raised the island before 9 AM, and signalling the other ships to rejoin, Columbus reached Island IV before noon, arriving at the northern point. Columbus describes this point as being surrounded by a reef, with a small island nearby. Columbus's descriptions of Island IV are, at best, confusing. He describes Island IV being "on an east-west course" from Island III (which contradicts his previous description of the fleet's movements