Hi, I have a complex case I'm trying to work with. I may be doing this completely wrong so if there is a better design for this I'm always open for that. However for now I'm going to assume my particular problem can be solved. There exists two classes: A and B. Class A is defined as such: class A { public: template< typename Archive > void load( Archive& archive, unsigned int ) { archive & m_listOfB; } private: std::vector<int> m_listOfInt; boost::ptr_vector<B> m_listOfB; }; And class B is defined roughly as: class B { public: template< typename Archive > void load( Archive& archive, unsigned int ) { // Code isn't important here } }; Here's the problem: For each B that is deserialized by A::load(), I need to pass in a reference to m_listOfInt. So, essentially the load() function in B would look something like this: void load( Archive& archive, unsigned int, std::vector<int>& listOfInt ) { } I was hoping boost.bind could be used somewhere, but I just don't see how. One way to solve the problem is to call B::load() explicitly with the extra parameter, but I don't think that's an appropriate solution. Any ideas on how to solve this? Or perhaps I'm trying to solve the wrong problem.