Sophie leaning back on a chair

My granddaughter Sophie, aged 9, can't stay still for long, so I got here to pose on this chair and took a few photos, and then made this sketch from the best one.

It is done in charcoal, with the pad supported by an easel so that I could work vertically. Some initial studies got the legs a bit too short, and the tilt of the head and the angle of the left arm took a few tried before I got them fairly right.

I tried to fill in quite a lot of detail, but felt I might actually ruin the image if I tinkered any more. So this slightly unfinished picture was the result, and was the main piece for my final assignment.