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.