I live just a couple of miles from Welbeck Abbey, Notts and have had a long interest in The Dukes of Portland, the estate andespecially the 5th Duke and the Druce case.
In addition to attending talks from a gentleman called Derek Adlam (curator of the Portland Collection)I have also picked up various publications about the subject. Perhaps the best "read" is a book called The Disappearing Duke by Tom Freeman-Keel and Andrew Crofts.
With regard to Thomas Charles Druce. He appears to be quite a mystery doesn't he! It would be great to split the fact from the fiction about him wouldn't it! Namely where he came from before me first married. Why he left his first wife and what happened to him before he popped up again in Baker Street!
The whole case seems quite complicated even today, so I imagine at the time it was headline grabbing to say the least! I'm sure DNA testing could put things to bed - but this could get in the way of a "good story".
If you care to contact me, I would love to help and perhaps I could learn more about this subject myself.