diff --git a/README.md b/README.md
index 2532296..8e07fe8 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 Four-Space Visualization of 4D Objects
-========================================
+====================================================================================================
 
 ![4D Hypercube](images/fig48-small.jpg)
 ![4D Octahedron](images/fig411-small.jpg)
diff --git a/ray4-c/CHANGELOG.md b/ray4-c/CHANGELOG.md
index 60bca6c..b92b751 100644
--- a/ray4-c/CHANGELOG.md
+++ b/ray4-c/CHANGELOG.md
@@ -1,5 +1,5 @@
 Change Log -- `ray4`
-================================================================================
+====================================================================================================
 
 # v0.1.50 (1992-01-25)
   - Release to public.
diff --git a/thesis/PostScript/README.md b/thesis/PostScript/README.md
index aca098d..e9ad762 100644
--- a/thesis/PostScript/README.md
+++ b/thesis/PostScript/README.md
@@ -1,9 +1,8 @@
 `ray4/thesis/PostScript/`
 ====================================================================================================
 
-This archive contains the PostScript versions of my thesis _Four-Space Visualization of 4D
-Objects_. These files were generated from the original `troff` sources found in the `troff/` peer
-directory.
+This archive contains the PostScript versions of my thesis _Four-Space Visualization of 4D Objects_.
+These files were generated from the original `troff` sources found in the `troff/` peer directory.
 
 The following files are included:
 
diff --git a/wire4/README.md b/wire4/README.md
index 85d9c67..27938bd 100644
--- a/wire4/README.md
+++ b/wire4/README.md
@@ -2,19 +2,19 @@ wire4
 ====================================================================================================
 
 This is the initial release of the 4D wireframe viewer that I wrote for my master’s thesis,
-“Four-Space Visualization of 4D Objects”, in May 1991. The thesis is also available in this same
-GitHub project or from http://hollasch.github.io/ray4.
+[“Four-Space Visualization of 4D Objects”][thesis], in May 1991. The thesis is also available in
+this same GitHub project or from http://hollasch.github.io/ray4.
 
 
 `wire4` User Manual
 --------------------
-See the [Wire4 User Manual][] for usage information.
+See the [Wire4 User Manual][wire4] for usage information.
 
 
 `psplot`
 ---------
 `psplot` is a simple PostScript plotting tool to convert wire4 output to a PostScript file. See the
-[psplot User Manual][] for more information.
+[psplot User Manual][psplot] for more information.
 
 
 Source Code
@@ -68,5 +68,6 @@ me:
 Steve Hollasch / steve@hollasch.net
 
 
-[Wire4 User Manual]:  wire4.md
-[psplot User Manual]: psplot.md
+[psplot]: psplot.md
+[thesis]: https://hollasch.github.io/ray4/Four-Space_Visualization_of_4D_Objects.html
+[wire4]:  wire4.md