I was contacted via my website www.gerhardart.com (you can also get there by clicking on the "Site" link next to my picture at the top of the page) to use Brian's concept of a World Without Cerebus. John's idea was to see the scene in "His First Fifth" after Cerebus has nabbed the bottle from the table, dropped the mop and scurried downstairs.
This is my rough pencil drawing of the scene with some grey shading added on the computer.
The next step will be to pencil it full size onto the watercolour paper. But I have a few other things to finish first.