The tremendous range of the heavy guns of the Fleet is shown at a glance here. The locality from which the attack is being delivered has a significance of its own also. It is the furthest point to which an enemy's fleet has ever come up the river: where the Dutch fleet stopped and turned back when Admiral de Ruyter made his attack in Charles the Second's reign. The enemy turned and raided the Medway, with the disastrous results history records. The 12-in. 50 - ton guns of the "Dreadnought" are of a newer type than those of the "King Edward VII." and are thus somewhat more powerful. They have an "estimated extreme range." as it is termed, of twenty-five miles, but for practical purposes fifteen miles is the limit up to which they are sighted. Firing at the extreme possible range, as our Illustration shows, all London would be at their mercy to the furthest suburbs of the metropolis.