From the NannyMUD documentation

LAST CHANGE

2001-03-31

FUNCTION

NAME
        clone - Clone an object.


SYNTAX
	clone 

DESCRIPTION
	Clones a copy of the "blue print" (the master object), which should
	normally not be used for anything else than cloning. If the object
	defined by the file isn't loaded, it will be. The function reset()
	will be called in the master object, with the argument equal to zero.
	Then a 	copy will be made of the master object, and likewise the
	function reset() will be run in the clone, too, with the argument equal
	to zero. The object will either be delivered to the wizards inventory
	or the environment of the wizard, depending on what is returned from a 
	call to the function get() in the clone.


NOTE
	If the master object has an environment, no clones can be made.
	Rooms and castles should normally not be cloned, since they are
	usually supposed to exist as single entities only.