It won't do to begin painting heads or much detail in this picture till
it's all settled. I do so believe in getting in the bones of a picture
properly first, then putting on the flesh and afterwards the skin, and
then another skin; last of all combing its hair and sending it forth to
the world. If you begin with the flesh and the skin and trust to getting
the bones right afterwards, it's such a slippery process.
_Burne-Jones._