Thirlmere Lake talk February 16, 2012February 16, 2012 • friends See slide show. A full house listened to an informed and rich talk by Dr Philip Pells on the disappearance of the waters of Thirlemere Lake system in the south west of the Sydney basis. A video of this talk will soon be available at this space. This slideshow requires JavaScript. Share this:TwitterFacebookLike this:Like Loading...