Here is the latest talk that was given in Gurdwara on Feb. 19th 1989. In this lecture he talks about quite a few different topics so it is hard to summarize.
[Audio:http://www.mrsikhnet.com/mp3player/educational/siri%20singh%20sahib/Siri%20Singh%20Sahib%20-%20Gurdwara%20Lecture%20-%20Feb%2019th%201989.mp3] Download
nice one…….