From the NannyMUD documentation

FUNCTION

NAME
        first_inventory - Get the first object of an object.


SYNTAX
	object first_inventory(object ob);

DESCRIPTION
	Get the first object in the inventory of "ob".


SEE ALSO
        next_inventory in efun/object_related/next_inventory


SEE ALSO
        all_inventory in efun/object_related/all_inventory


SEE ALSO
        deep_inventory in efun/object_related/deep_inventory