Here is another picture of Mars.
Although not as good as Peter's recent one, it shows the same features. I rotated the image so north is at the top.
After the talk about using webcams at the last RAG meeting, I was inspired to dig my Toucam out of its box where it has been for the last few years. I was then inspired to get it to work with Windows 7 (non-trivial!) followed by trying to get a version of Registax to work with the mpg files it then produced. Again, non-trivial! Ultimately I got Registax v5 running on my 32-bit netbook and accepting the video files from the Toucam & the result is attached.