new file mode 100644
--- /dev/null
+++ b/liboctave/Array3.cc
@@ -0,0 +1,114 @@
+// Template array classes                              -*- C++ -*-
+/*
+
+Copyright (C) 1996 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <cassert>
+
+#include <iostream.h>
+
+#include "Array3.h"
+
+#if defined (HEAVYWEIGHT_INDEXING)
+#include "idx-vector.h"
+#include "Array3-idx.h"
+#endif
+
+#include "lo-error.h"
+
+// Three dimensional array class.
+
+template <class T>
+T&
+Array3<T>::checkelem (int i, int j, int k)
+{
+  if (i < 0 || j < 0 || k < 0 || i >= d1 || j >= d2 || k >= d3)
+    {
+      (*current_liboctave_error_handler) ("range error");
+      static T foo;
+      return foo;
+    }
+  return Array2<T>::elem (i, d1*k+j);
+}
+
+template <class T>
+T
+Array3<T>::elem (int i, int j, int k) const
+{
+  return Array2<T>::elem (i, d2*k+j);
+}
+
+template <class T>
+T
+Array3<T>::checkelem (int i, int j, int k) const
+{
+  if (i < 0 || j < 0 || k < 0 || i >= d1 || j >= d2 || k >= d3)
+    {
+      (*current_liboctave_error_handler) ("range error");
+      T foo;
+      static T *bar = &foo;
+      return foo;
+    }
+  return Array2<T>::elem (i, d1*k+j);
+}
+
+template <class T>
+T
+Array3<T>::operator () (int i, int j, int k) const
+{
+  if (i < 0 || j < 0 || k < 0 || i >= d1 || j >= d2 || k >= d3)
+    {
+      (*current_liboctave_error_handler) ("range error");
+      T foo;
+      static T *bar = &foo;
+      return foo;
+    }
+  return Array2<T>::elem (i, d2*k+j);
+}
+
+template <class T>
+void
+Array3<T>::resize (int n, int m, int k)
+{
+  assert (0); // XXX FIXME XXX
+}
+
+template <class T>
+void
+Array3<T>::resize (int n, int m, int k, const T& val)
+{
+  assert (0); // XXX FIXME XXX
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/