Luckily, with John to help me, I was relieved of the task of cutting all the mounts, labelling all the artwork and packaging everything up, (which seems to take ages), so I was able to continue with the artwork up to the last minute. By Thursday evening I'd finished the spread I started that morning, the final spread of the book, and wasn't sure how best to spend my final day.
It's always a problem when half my artwork is sent on ahead - I'm left with no colour reference for the rest of the illustrations, so have to down-tools until it's returned. So, I hatched a cunning plan... I decided to spend my last day colouring something I wouldn't send with the rest: