c++ - Private Node Ctor in LL trouble

The following is a linked list header file:

// list.h
class list
{
public:
    list(void);             // constructor

    virtual ~list(void);    // destructor
    void displayByName(ostream& out) const;
    void displayByRating(ostream& out) const;
    void insert(const winery& winery);
    winery * const find(const char * const name) const;
    bool remove(const char * const name);

private:
    struct node
    {

        node(const winery& winery);     // constructor
        winery item;
        node * nextByName;
        node * nextByRating;
    };

    node * headByName;
    node * headByRating;
};

the winery ctor has 4 param's as follows:

// code in main.cpp
// this statement is very important
// I am trying to add the info to the list as a reference to the node ctor
wineries->insert(winery("Lopez Island Vinyard", "San Juan Islands", 7, 95));

I execute the code so far.

I debug and it takes me to the ctor. I use the ctor init list to initialize
the private member varaibles.

//winery.cpp
winery::winery(const char * const name, const char * const location, const int acres, const int rating)
  : name( new char[strlen(name)+1] ), location( new char[strlen(location)+1] ), acres( 0 ), rating( 0 )
{   
    // arcres, name, location, rating, are all private members of the winery class


}

then we go to the linkedlist:

//list.cpp
void list::insert(const winery& winery)
{   
    list *ListPtr = new list();
// here im trying to add all the info to the list:

    node *NodePtr = new node( winery );

}

I get a linker error: LNK2019: unresolved external symbol "public: __thiscall list::node::node(class winery const &)" (??0node@list@@QAE@ABVwinery@@@Z) referenced in function "public: void __thiscall list::insert(class winery const &)" (?insert@list@@QAEXABVwinery@@@Z)

because the node ctor is a a structure that is private to the linked list? list.cpp?