diff --git a/Local-installation.md b/Local-installation.md
index fcd1b91..e46ec32 100644
--- a/Local-installation.md
+++ b/Local-installation.md
@@ -1,14 +1,17 @@
-The installation directory of roswell is configurable by specifying --prefix option to ./configure. The default location is /usr/local. Actual binary and supporting files are finally installed into $PREFIX/share/common-lisp/source/roswell/.
+In [1.-Installation](1.-Installation), we described how to install roswell from the source, but it assumed the global installation.
 
-This is useful when using roswell as a backend of CI services (e.g. travis): When you specify a directory accessible without root permission, then you can switch to the new container-based infrastructure for faster startup (of the tests).
+However, local installation is available. **The installation directory is configurable** by specifying `--prefix` option to `./configure`. The default location is `/usr/local`. Actual binary and supporting files are finally installed into `$PREFIX/share/common-lisp/source/roswell/`.
 
-This option can be used to write an installation script for CI services, but we already provide such a script for Travis, CircleCI and Coverall using this feature.
+This is useful when using roswell as a backend of CI services (e.g. travis): When you specify a directory accessible without root permission, then you can switch to the new [container-based infrastructure](http://docs.travis-ci.com/user/workers/container-based-infrastructure/) for faster startup (of the tests). 
+
+This option can be used to write an installation script for CI services, but [we already provide such a script for Travis, CircleCI and Coverall](4.-Roswell-as-a-Testing-Environment-(Travis-CI-and-Coverall)) using this feature. 
 
 Example:
 
-$ git clone -b release https://github.com/snmsts/roswell.git
-$ cd roswell
-$ sh bootstrap
-$ ./configure --prefix ~/.local/
-$ make && make install              ### in this case, no sudo is required!
-$ ~/.local/bin/ros
+    $ git clone -b release https://github.com/snmsts/roswell.git
+    $ cd roswell
+    $ sh bootstrap
+    $ ./configure --prefix ~/.local/
+    $ make && make install              ### in this case, no sudo is required!
+    $ ~/.local/bin/ros
+