Albert assented, and, returning, they informed the council that they were ready to undertake the charge of keeping thirty men-at-arms each, always in readiness for service, and for fighting the pirates by land or water. Returning home, preparations were speedily made, and the men enrolled and drilled. A watch-tower was raised on an eminence that was visible from both castles, and a look-out place also erected at the mouth of the Medway. This was some sixty feet high. A great cresset was placed at the summit ready for firing, and an arrangement made with the tenants, on whose land it stood, that a man should be on watch night and day. His duty would be to keep a vigilant eye on the river, and to light the beacon if any suspicious vessels were seen coming up. The smoke by day or the fire at night could be seen at both castles, and by a pre-arranged system signals could then be exchanged between Edgar and Albert by means of the watch-tower on the hill. Albert had two large and fast galleys constructed, for his wife's dowry enabled him to spend money more freely than Edgar. They had a good many encounters with the freebooters. Two or three times strong parties that had landed from ships were attacked by the garrisons of both castles, joined by the tenantry near, and were driven to the boats with heavy loss. Once the beacon from the mouth of the Medway signalled that three ships had entered the mouth of that river. Edgar signalled to Cliffe, and when at ten o'clock the French landed just below Hoo, thinking to make an easy capture of the village, and, perhaps, even to carry the castle by surprise, they were allowed to ascend the hill undisturbed, and were then attacked by the sixty men-at-arms, led by the two knights, together with a number of villagers and countrymen armed with bows and bills. Although superior in numbers the French were driven down the hill with great slaughter. Only a few succeeded in regaining their ships; but the tide had not yet turned, and there was little wind. Boats were obtained at Upnor, the vessels boarded, and all on board put to the sword. Three or four sharp engagements also took place between the galleys and the pirates ascending the Thames, and at various times rich prizes that the pirates had taken higher up the river were recovered from them; so that in time the depredations greatly abated, and the city of London presented the two knights with costly swords and a vote of thanks for the great services they had rendered to the city, and to those trading with it.