I am, of course, not now alluding to vessels that have gone temporarily missing, for they may in most cases be traced to the operations of the enemy; but I refer to those which vanish utterly, leaving no trace of any kind behind them to hint at their fate; and also to those other craft which are fallen in with, derelict, from time to time, plundered, and bearing indications that an attempt has been made to destroy them, either by scuttling them, or setting them on fire.
