Help Me, Groupmind, Redux

[madrobins]

desperance suggested I repost this, given the ups, downs, and sideways of LJ in the last couple of days:

Not for Sarah Tolerance #4, but for a subsequent book, I'm trying to find information on slavery in England in 1811 or thereabouts. I know that the slave trade was abolished in 1807, putting a theoretical end to the triangle trade from England to Africa to America and/or British colonies. I know that human ownership of humans was prohibited in 1833/34. And I've found all sorts of material on slavery in British colonies. What I'm trying to find is evidence of slaveholding in England itself, and on the experience of people of color in England at the time--slave or free.

I'm not having a whole lot of luck finding it this afternoon, so I turn to All You Smart People to see if someone knows something. I'm obviously not looking in the right places.