On August 22, 11.23 am my laptop* was stolen from my house (I left it connected to the Internet when I went out for 1 1/2 hours to have brunch at a nearby cafe, which is why I know the precise time when it was taken...from the ISP record of connection termination).

Anyway, I'd spent days preparing lectures 5 and 6 and lost these together with my laptop.

Can you back-up too often? No!

Lectures 5 and 6 have no backup notes online because I did not have the time to re-write these notes after they disappeared with my computer-sorry!

* (Titanium powerbook 667mhz Serial No QT2221Q8LP4 with distinctive damage on the top left side of the outer keyboard panel and my name written in indelible UV visible ink on the top right side of the outside of the screen panel)