Who is Toby Byng from Possession: A Romance and what is their importance?

Toby Byng is Sir George's solicitor. He gives Sir George advice on financial matters. Toby follows up with Blackadder on the value of the letters between Christabel and Ash. Toby is also a partner of Euan MacIntyre in part ownership of a racehorse. Euan and Toby realize they both have a connection to the discovery of the letters, and they come together to help Roland and Maud finally solve the mystery. Toby is thin, freckle faced, and he has curly, fair hair along his ears and is bald on top.