It is not a little remarkable, that the Chinese authorities should have been able to keep foreigners so long in complete ignorance of some of the most important branches of their magnificent river, which for two centuries had witnessed the yearly increase of foreign commerce. This no doubt was effected by the jealous orders which were issued to their pilots, who dared not follow any other than the old prescribed track. Yet it is also remarkable that, among so many ships which have annually visited the river, none should have been found whose commanders were led by curiosity, or stimulated by the tiresome sameness of an everyday life during the dull season, to explore in open boats some of those large and tempting passages, the openings of which could be seen. Had not the war stimulated our exertions, or awakened our curiosity, we should, without doubt, have remained as ignorant as ever of the capabilities of the river, the extent of which was scarcely even surmised.[32] No wonder that smuggling in every form has been long carried on to such a notorious extent by the Chinese at Whampoa, and in other parts of the river. The communications by water from one point to another, and with the interior of the country, are so numerous, and so interwoven with each other, that it would be impossible for any system of fiscal regulations which the Chinese could adopt to act efficiently against the complicated machinery of evasion which could so easily be put in operation. This, among other reasons, may have contributed (always secondary, however, to their jealousy of foreigners) to the strictness of their orders respecting the anchorage for our ships. The light squadron proceeded up the river early on the morning of the 27th of February. It was not yet perfectly ascertained what obstacles were to be met with, although it was well known that the Chinese had been making extensive preparations to impede the advance of our forces. The wind was light throughout the day, and the Sulphur, which was to have been the leading vessel, fell behind; the Nemesis, therefore, now took the lead, and proceeded with caution, giving the soundings by signal to the squadron, by means of flags fastened to the ends of long bamboos; by which contrivance the signals could be made with the greatest rapidity.[33]