diff --git a/runtime/doc/if_sniff.txt b/runtime/doc/if_sniff.txt
new file mode 100644
index 0000000..12b34c4
--- /dev/null
+++ b/runtime/doc/if_sniff.txt
@@ -0,0 +1,95 @@
+*if_sniff.txt*	For Vim version 7.0aa.  Last change: 2001 Sep 03
+
+
+		  VIM REFERENCE MANUAL
+		by Anton Leherbauer (toni@takefive.co.at)
+
+
+SNiFF+ and Vim				    *sniff*
+
+1. Introduction				    |sniff-intro|
+2. Commands				    |sniff-commands|
+3. Compiling Vim with SNiFF+ interface	    |sniff-compiling|
+
+{Vi does not have any of these commands}  *E275* *E274* *E276* *E278* *E279*
+
+The SNiFF+ interface only works, when Vim was compiled with the |+sniff|
+feature.
+
+==============================================================================
+1. Introduction					*sniff-intro*
+
+The following features for the use with SNiFF+ are available:
+
+   * Vim can be used for all editing requests
+   * SNiFF+ recognizes and updates all browsers when a file is saved in Vim
+   * SNiFF+ commands can be issued directly from Vim
+
+How to use Vim with SNiFF+
+   1. Make sure SNiFF+ is running.
+   2. In the Editor view of the Preferences dialog set the Field named
+      'External Editor' to 'Emacs/Vim'.
+   4. Start Vim
+   5. Connect to SNiFF+ (:sniff connect)
+
+Once a connection is established, SNiFF+ uses Vim for all requests to show or
+edit source code.  On the other hand, you can send queries to SNiFF+ with the
+:sniff command.
+
+==============================================================================
+2. Commands				    *sniff-commands*
+
+			    *:sniff* *:sni*
+:sni[ff] request [symbol]   Send request to sniff with optional symbol.
+			    {not in Vi}
+:sni[ff]		    Display all possible requests and the connection
+			    status
+
+Most requests require a symbol (identifier) as parameter. If it is omitted,
+Vim will use the current word under the cursor.
+The available requests are listed below:
+
+request		      mapping	description
+-------------------------------------------------------------------------------
+connect			sc	Establish connection with SNiFF+.
+				Make sure SNiFF+ is prepared for this in the
+				Preferences
+disconnect		sq	Disconnect from SNiFF+. You can reconnect any
+				time with :sniff connect (or 'sc')
+toggle			st	Toggle between implementation
+				and definition file
+find-symbol		sf	Load the symbol into a Symbol Browser
+browse-class		sb	Loads the class into a Class Browser
+superclass		ss	Edit superclass of symbol
+overridden		so	Edit overridden method of symbol
+retrieve-file		srf	Retrieve symbol in current file
+retrieve-project	srp	Retrieve symbol in current project
+retrieve-all-projects	srP	Retrieve symbol in all projects
+retrieve-next		sR	Retrieve symbol using current Retriever
+				settings
+goto-symbol		sg	Goto definition or implementation of symbol
+hierarchy		sh	Load symbol into the Hierarchy Browser
+restr-hier		sH	same as above but show only related classes
+xref-to			sxt	Start a refers-to query on symbol and
+				load the results into the Cross Referencer
+xref-by			sxb	Start a referred-by query on symbol
+xref-has		sxh	Start a refers-to components query on symbol
+xref-used-by		sxu	Start a referred-by as component query on
+				symbol
+show-docu		sd	Show documentation of symbol
+gen-docu		sD	Generate documentation of symbol
+
+The mappings are defined in a file 'sniff.vim', which is part of every SNiFF+
+product ($SNIFF_DIR/config/sniff.vim). This file is sourced whenever Vim
+connects to SNiFF+.
+
+==============================================================================
+3. Compiling Vim with SNiFF+ interface		*sniff-compiling*
+
+To compile Vim with SNiFF+ support, you need two source files of the extra
+archive: if_sniff.c and if_sniff.h.
+On Unix: Edit the Makefile and uncomment the line "--enable-sniff".  Or run
+configure manually with this argument.
+On NT: Specify SNIFF=yes with your make command.
+
+ vim:tw=78:ts=8:ft=help:norl: