diff --git a/Source/ConstantString.m b/Source/ConstantString.m
new file mode 100644
index 000000000..2cbcfd2f0
--- /dev/null
+++ b/Source/ConstantString.m
@@ -0,0 +1,109 @@
+/* Implementation for GNU Objective-C ConstantString object
+   Copyright (C) 1993,1994 Free Software Foundation, Inc.
+
+   Written by:  R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
+   Date: July 1994
+
+   This file is part of the GNU Objective C Class Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/ 
+
+#include <objects/String.h>
+#include <objects/IndexedCollectionPrivate.h>
+
+@implementation ConstantString
+
+// INITIALIZING;
+
+/* This must work without sending any messages to content objects */
+- empty
+{
+  [self shouldNotImplement:_cmd];
+  return self;
+}
+
+// REPLACING;
+
+- replaceAllStrings: (String*)oldString with: (String*)newString
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- replaceFirstString: (String*)oldString with: (String*)newString
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- replaceFirstString: (String*)oldString 
+    afterIndex: (unsigned)index 
+    with: (String*)newString
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setToAllCapitals
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setToInitialCapitals
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setToLowerCase
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- trimBlanks
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+
+// SETTING VALUES;
+
+- setIntValue: (int)anInt
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setFloatValue: (float)aFloat
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setDoubleValue: (double)aDouble
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setCStringValue: (const char *)aCString
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+- setStringValue: (String*)aString
+{
+  return [self shouldNotImplement:_cmd];
+}
+
+@end
+
+
+@implementation NXConstantString
+@end
diff --git a/Source/NSString.m b/Source/NSString.m
new file mode 100644
index 000000000..f8f7d2b1b
--- /dev/null
+++ b/Source/NSString.m
@@ -0,0 +1,27 @@
+/* Implementation of GNUSTEP string class
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   
+   Written by:  R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
+   Date: January 1995
+   
+   This file is part of the GNU Objective C Class Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   */ 
+
+#include <foundation/NSString.h>
+
+@implementation NSString
+@end