diff --git a/tren.rst b/tren.rst
index 5b021a9..b6401d4 100644
--- a/tren.rst
+++ b/tren.rst
@@ -149,7 +149,7 @@
         losing the original file- or directory.
 
 
-  -C   Do case-sensitive renaming
+  -C   Do case sensitive renaming
 
          (*Default*: This is the program default)
 
@@ -519,17 +519,16 @@
 There are three command line options that can give you some
 measure of help and information about using **tren**:
 
-  -d   Dumps debug information out to stderr.  You can
-       insert multiple instances of this option on the
-       command line to see how the program has parsed
-       everything *to the left* of it.  This is primarily
-       intended as a debugging tool for people maintaining
-       **tren** but it does provide considerable information
-       on the internal state of the program that advanced
-       users may find useful.
+  -d   Dumps debug information out to stderr.  You can insert multiple
+       instances of this option on the command line to see how the
+       program has parsed everything *to the left* of it.  This is
+       primarily intended as a debugging tool for people maintaining
+       **tren** but it does provide considerable information on the
+       internal state of the program that advanced users may find
+       useful.
 
-  -h   Prints a summary of the program invocation syntax
-       and all the available options and then exits.
+  -h   Prints a summary of the program invocation syntax and all the
+       available options and then exits.
 
   -v   Prints the program version number and keeps running.
 
@@ -544,7 +543,7 @@
   -q    Set's "quiet" mode and suppresses everthing except
         error messages.
 
-  -w  #  Tells **tren** to wrap lines after ``#`` characters have been
+  -w #   Tells **tren** to wrap lines after ``#`` characters have been
          printed.  If you're capturing output to a log, set this to a
          very high number like 999 to inhibit line wrapping.
 
@@ -577,7 +576,7 @@
   # tren Command Line
   # Converts '.jpeg' (in any case mixture) file name suffix to '.jpg'
 
-  # Make the replacement case-insensitive
+  # Make the replacement case insensitive
   -c   # Reset this later on the command line with -C
 
   # Only replace the rightmost instance
@@ -594,7 +593,8 @@
 files *in* an include file::
 
   # Get the jpeg -> jpg suffix renaming
-  -I jpeg-to-jpg.tren
+
+  -I  jpeg-to-jpg.tren
 
   # Let's make it fancy
 
@@ -1014,17 +1014,41 @@
             mv file dir
 
           However, this is an ``mv`` "move" semantic, and is not
-          properly a renaming operation.  The underling file system
+          properly a renaming operation.  The underlying file system
           will not permit a file to be renamed over a directory or
-          vice versa.  **tren** reflects this OS semantic ... it's
-          not intended to be a reimplementation of ``mv``.
+          vice versa.  **tren** reflects this OS semantic ... it's not
+          intended to be a reimplementation of ``mv``.
 
 
 Ignoring Case
 =============
 
+"Literal" string substitution means just that - **tren** must find an
+exact instance of ``old`` in the file name being renamed and replace
+it with ``new``.  So, the default is to do *case sensitive* matching.
+There are times, however, when you want to ignore case when doing this
+matching.  For example, suppose you have file names with a variety of
+suffixes in various case combinations like ``.jpeg``, ``.Jpeg``, and
+``.JPEG``.  Suppose you'd like these to all be changed to ``.jpg``.
+Rather than having to do three separate renaming operations it's handy
+to just ignore case *when matching the old string for replacement*.
+That's what the ``-c`` option is for::
 
+  tren.py -i -1 -c -r.jpeg=.jpg *.jpeg *.Jpeg *.JPEG
 
+Notice that the case-insensitivity only applies to the *matching* of
+the ``old`` string.  Once **tren** has determined such a match exists,
+the ``new`` string is used *literally* with case intact.
+
+You can turn case sensitivity on- and off for various renaming
+requests on the same command line.  ``-C`` turns case sensitivity on,
+and - as we just saw - ``-c`` turns it off::
+
+  tren.py -cr X=y -Cr A=b ...
+
+The ``X=y`` renaming request will be done in a case insensitive
+manner, whereas the ``A=b`` will be done only on literal instances of
+upper case ``A`` in the target file names.
 
 
 The Strange Case Of Mac OS X And Windows
@@ -1716,7 +1740,7 @@
 
 ::
 
-  $Id: tren.rst,v 1.157 2010/03/29 15:49:55 tundra Exp $
+  $Id: tren.rst,v 1.158 2010/03/29 16:15:00 tundra Exp $
 
 You can find the latest version of this program at: