Did anyone see the similarities between Isaac Newton in this picture,
and this image from the daughters of albion,
I put it down to Blake trying to say that Theotormon is as stubborn as Newton (science) and rigid in their beliefs. They won't accept any other points of view and it is this flaw which stops theotormon from moving on and accepting Oothoon for what she is. They are both drawn with very straight lines and evoke feelings of a person with a hard exterior and little emotions.
P.S. Sorry about the size of the image but i am not very good with this sort of stuff.