[reportlab-users] Noob Table Question

[Chris Irish]

Hi all.....1st post :P
  I'm reading the userguide and I can't find where it describes what 
negative row and column numbers refer to.  If I had the cells:

00  01  02  03
10  11  12  13
20  21  22  23
30  31  32  33

It's obvious which one is (1,1) or (3,2), but which cells would be 
(-1,-2) or (0, -3) when I'm setting a style?  Thanks in advance for any 
help/tips.

Chris