I have spent quite a while trying to get this extension to work, including exchanges with it's author, but to date without success. The extension fails whilst attempting to connect to the Google api. If there is anyone out there who does have it working I'd be grateful for a heads up and any pointers to how you did it. FI, my test installation is here.
Topic on Extension talk:ChapTimeline
Today I installed the newest version (Version 0.1) via git - everything works just fine! Cheers, Basil
forgot to mention: MediaWiki 1.21.2, Semantic MediaWiki 1.8.0.4