I found a pretty complete lot of audio files of early lectures. My only advice is: if you think you may want to refer to it in the future, get it now. These things have historically come and gone pretty fast. http://www.mediafire.com/?709kp6q5zquje It looks like it starts with 5008C30 Preventative and ends with 6012C31C A Talk on South Africa. I see duplicates in the folder, but it's no problem since they show in order, and you can easily avoid acquiring the duplicate copy in the folder. If you have a Mediafire (free) account, and use that to copy the entire folder to your account, then you will get all of the duplicates in the folder. Not a big deal, but I thought I'd point it out.