-These files will be linked to symbolically in a directory ./public/. If you
-provide a file suffixed .links to basename of an article file, these links will
-be added as article-specific linkbacks to the .html file and the feed entry.
+These files will be linked to symbolically in a directory ./public/.
+
+If you provide or edit a file suffixed .links to basename of an article file,
+these links will be added as article-specific linkbacks to the .html file and
+the feed entry.
+
+Just like the .links files, article-specific files containing captcha data are
+created and can be edited in ./captchas/linkable/. The first line of such a file
+is meant as a captcha, and the second line as its description, which may be
+inserted via templating into the article HTML file.