So Alexander led the splendid army which had been packed in, and unpacked from, the flat boats of Newport and Dunkerk, against Bergen-op-Zoom, and besieged that city in form. Once of great commercial importance, although somewhat fallen away from its original prosperity, Bergen was well situate on a little stream which connected it with the tide-waters of the Scheldt, and was the only place in Brabant, except Willemstad, still remaining to the States. Opposite lay the Isle of Tholen from which it was easily to be supplied and reinforced. The Vosmeer, a branch of the Scheldt, separated the island from the main, and there was a path along the bed of that estuary, which, at dead low-water, was practicable for wading. Alexander, accordingly, sent a party of eight hundred pikemen, under Montigny, Marquis of Renty, and Ottavio Mansfeld, supported on the dyke by three thousand musketeers, across; the dangerous ford, at ebb-tide, in order to seize this important island. It was an adventure similar to those, which, in the days of the grand commander, and under the guidance of Mondragon; had been on two occasions so brilliantly successful. But the Isle of Tholen was now defended by Count Solms and a garrison of fierce amphibious Zeelanders--of those determined bands which had just been holding Farnese and his fleet in prison, and daring him to the issue--and the invading party, after fortunately accomplishing their night journey along the bottom of the Vosmeer, were unable to effect a landing, were driven with considerable loss into the waves again, and compelled to find their way back as best they could, along their dangerous path, and with a rapidly rising tide. It was a blind and desperate venture, and the Vosmeer soon swallowed four hundred of the Spaniards. The rest, half-drowned or smothered, succeeded in reaching the shore--the chiefs of the expedition, Renty and Mansfeld, having been with difficulty rescued by their followers, when nearly sinking in the tide. The Duke continued the siege, but the place was well defended by an English and Dutch garrison, to the number of five thousand, and commanded by Colonel Morgan, that bold and much experienced Welshman, so well known in the Netherland wars. Willoughby and Maurice of Nassau, and Olden- Barneveld were, at different times, within the walls; for the Duke had been unable to invest the place so closely as to prevent all communications from without; and, while Maurice was present, there were almost daily sorties from the town, with many a spirited skirmish, to give pleasure to the martial young Prince. The English, officers, Vere and Baskerville, and two Netherland colonels, the brothers Bax, most distinguished themselves on these occasions. The siege was not going on with the good fortune which had usually attended the Spanish leaguer. of Dutch cities, while, on the 29th September, a personal incident came to increase Alexander's dissatisfaction and melancholy.