diff --git a/build/vc80/turtle.vcproj b/build/vc80/turtle.vcproj
index 25b6967..12d874f 100644
--- a/build/vc80/turtle.vcproj
+++ b/build/vc80/turtle.vcproj
@@ -228,10 +228,6 @@
 				RelativePath="..\..\src\libraries\turtle\sequence.hpp"
 				>
 			</File>
-			<File
-				RelativePath="..\..\src\libraries\turtle\sequenceable.hpp"
-				>
-			</File>
 			<File
 				RelativePath="..\..\src\libraries\turtle\type_name.hpp"
 				>
diff --git a/src/libraries/turtle/expectation.hpp b/src/libraries/turtle/expectation.hpp
index 398f743..6d6f312 100644
--- a/src/libraries/turtle/expectation.hpp
+++ b/src/libraries/turtle/expectation.hpp
@@ -29,7 +29,7 @@ namespace mock
 {
 namespace detail
 {
-    class expectation_base : private sequenceable
+    class expectation_base
     {
     public:
         expectation_base()
@@ -41,7 +41,7 @@ namespace detail
         {
             for( sequences_cit it = sequences_.begin();
                 it != sequences_.end(); ++it )
-                (*it)->remove( *this );
+                (*it)->remove( this );
         }
 
         void set_location( const std::string& file, int line )
@@ -59,12 +59,12 @@ namespace detail
         {
             for( sequences_cit it = sequences_.begin();
                 it != sequences_.end(); ++it )
-                if( ! (*it)->is_valid( *this ) )
+                if( ! (*it)->is_valid( this ) )
                     return false;
             bool result = i_->invoke();
             for( sequences_cit it = sequences_.begin();
                 it != sequences_.end(); ++it )
-                (*it)->call( *this );
+                (*it)->invalidate( this );
             return result;
         }
 
@@ -85,20 +85,14 @@ namespace detail
             i_.reset( i );
         }
 
-        void add( sequence& s )
+        void add( boost::shared_ptr< detail::sequence_impl > s )
         {
-            s.add( *this );
-            sequences_.push_back( &s );
+            s->add( this );
+            sequences_.push_back( s );
         }
 
     private:
-        virtual void remove( sequence& s )
-        {
-            sequences_.erase( std::remove( sequences_.begin(),
-                sequences_.end(), &s ), sequences_.end() );
-        }
-
-        typedef std::vector< sequence* > sequences_type;
+        typedef std::vector< boost::shared_ptr< detail::sequence_impl > > sequences_type;
         typedef sequences_type::const_iterator sequences_cit;
 
         sequences_type sequences_;
@@ -114,7 +108,7 @@ namespace detail
 #define MOCK_EXPECTATION_METHODS \
         expectation& in( sequence& s ) \
         { \
-            add( s ); \
+            add( s.impl_ ); \
             return *this; \
         } \
         expectation& once() \
diff --git a/src/libraries/turtle/sequence.hpp b/src/libraries/turtle/sequence.hpp
index 1dae7d2..00c291f 100644
--- a/src/libraries/turtle/sequence.hpp
+++ b/src/libraries/turtle/sequence.hpp
@@ -9,61 +9,58 @@
 #ifndef MOCK_SEQUENCE_HPP_INCLUDED
 #define MOCK_SEQUENCE_HPP_INCLUDED
 
-#include "sequenceable.hpp"
 #include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
 #include <algorithm>
 #include <vector>
 
 namespace mock
 {
-    class sequence : private boost::noncopyable
+namespace detail
+{
+    class sequence_impl : private boost::noncopyable
     {
     public:
-        ~sequence()
+        void add( void* e )
         {
-            for( orderables_it it = orderables_.begin();
-                it != orderables_.end(); ++it )
-                (*it)->remove( *this );
-            for( orderables_it it = called_.begin();
-                it != called_.end(); ++it )
-                (*it)->remove( *this );
+            elements_.push_back( e );
+        }
+        void remove( void* e )
+        {
+            elements_.erase( std::remove( elements_.begin(),
+                elements_.end(), e ), elements_.end() );
         }
 
-        void add( detail::sequenceable& o )
+        bool is_valid( const void* e ) const
         {
-            orderables_.push_back( &o );
-        }
-        void remove( detail::sequenceable& o )
-        {
-            orderables_.erase( std::remove( orderables_.begin(),
-                orderables_.end(), &o ), orderables_.end() );
-            called_.erase( std::remove( called_.begin(),
-                called_.end(), &o ), called_.end() );
+            return std::find( elements_.begin(), elements_.end(), e )
+                != elements_.end();
         }
 
-        bool is_valid( const detail::sequenceable& o ) const
+        void invalidate( const void* e )
         {
-            return std::find( called_.begin(), called_.end(), &o )
-                == called_.end();
-        }
-
-        void call( const detail::sequenceable& o )
-        {
-            orderables_it it =
-                std::find( orderables_.begin(), orderables_.end(), &o );
-            if( it != orderables_.end() )
-            {
-                std::copy( orderables_.begin(), it,
-                    std::back_inserter( called_ ) );
-                orderables_.erase( orderables_.begin(), it );
-            }
+            elements_it it =
+                std::find( elements_.begin(), elements_.end(), e );
+            if( it != elements_.end() )
+                elements_.erase( elements_.begin(), it );
         }
 
     private:
-        typedef std::vector< detail::sequenceable* > orderables_type;
-        typedef orderables_type::iterator orderables_it;
+        typedef std::vector< void* > elements_type;
+        typedef elements_type::iterator elements_it;
 
-        orderables_type orderables_, called_;
+        elements_type elements_;
+    };
+}
+
+    class sequence
+    {
+    public:
+        sequence()
+            : impl_( new detail::sequence_impl() )
+        {}
+
+        boost::shared_ptr< detail::sequence_impl > impl_;
     };
 }
 
diff --git a/src/libraries/turtle/sequenceable.hpp b/src/libraries/turtle/sequenceable.hpp
deleted file mode 100644
index 694ce94..0000000
--- a/src/libraries/turtle/sequenceable.hpp
+++ /dev/null
@@ -1,30 +0,0 @@
-//
-//  Copyright Mathieu Champlon 2009
-//
-//  Distributed under the Boost Software License, Version 1.0. (See
-//  accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#ifndef MOCK_SEQUENCEABLE_HPP_INCLUDED
-#define MOCK_SEQUENCEABLE_HPP_INCLUDED
-
-namespace mock
-{
-    class sequence;
-
-namespace detail
-{
-    class sequenceable
-    {
-    public:
-        sequenceable() {}
-        virtual ~sequenceable() {}
-
-        virtual void remove( sequence& s ) = 0;
-    };
-}
-
-}
-
-#endif // #ifndef MOCK_SEQUENCEABLE_HPP_INCLUDED
diff --git a/src/tests/turtle_test/sequence_test.cpp b/src/tests/turtle_test/sequence_test.cpp
index b3b49ab..65eb4cc 100644
--- a/src/tests/turtle_test/sequence_test.cpp
+++ b/src/tests/turtle_test/sequence_test.cpp
@@ -70,7 +70,7 @@ BOOST_AUTO_TEST_CASE( registering_to_a_sequence_enforces_call_order_verification
     BOOST_CHECK_THROW( e1(), std::exception );
 }
 
-BOOST_AUTO_TEST_CASE( destroying_a_sequence_removes_order_call_enforcement )
+BOOST_AUTO_TEST_CASE( destroying_a_sequence_does_not_remove_order_call_enforcement )
 {
     mock::function< void() > e1, e2;
     {
@@ -79,9 +79,7 @@ BOOST_AUTO_TEST_CASE( destroying_a_sequence_removes_order_call_enforcement )
         e2.expect().once().in( s );
     }
     BOOST_CHECK_NO_THROW( e2() );
-    BOOST_CHECK_NO_THROW( e1() );
-    BOOST_CHECK( e1.verify() );
-    BOOST_CHECK( e2.verify() );
+    BOOST_CHECK_THROW( e1(), std::exception );
 }
 
 BOOST_AUTO_TEST_CASE( resetting_an_expectation_removes_it_from_order_call_enforcement )