... at Claremont, 23 Clarendon Road, Leeds, LS2 9NZ?
If so, please could you look at the following reference?
Hopkinson's Coats of Arms and Pedigrees for Yorkshire Families [copy] MD335/13/2 [19th century]
I would love a copy of something in Volume 2 (MD335/13/2/2) - apparently there is a pedigree of the NALSON family of Methley, Yorkshire.
If someone could do it, I'm happy to pay travel / photocopying costs. PM me to arrange.