What is Lizzie's prize possession in the novel, Wench?

Mr. Goodfellow is the one-eyed horse that Drayle first took Lizzie riding on when he brought her to meet Polly, her long lost sister. Mr. Goodfellow becomes Lizzie's prized "possession" - although he doesn't belong to her - and when she fears Drayle is going to sell him, she takes him out for one last ride, symbolic of the control she wishes to have over her own future. Although Mr. Goodfellow is a good horse and is dear to Lizzie, Drayle has the power to sell the horse as he pleases. This is similar to the power he has to sell Lizzie - whom he claims is special to him - because she, like the horse, is simply a possession.