Hi Michael.... Have you tried the searching Death Duty Records...Wills etc.
A good place to start would be at the Public Record Office.
They have Death Duty Indexes there from 1793-1857..Indexed as IR26 & IR27
The Website for the Public Record Office is
http://www.pro.gov.uk
I wish you every success...Let us know how you got on.
Keep Smiling
Jill Van Der Reyden
http://www.geocities.com/Heartland/River/1415