Primary Valuation of Tenants

Hi

While continuing my research I came acrossa record for James O'Brien in the Primary Valuation of Tenents and it looks as if he lives in a house belonging to D&K Railway Comp. Would you know if this company held records I could check. I also found information on Griffiths Valuation record and on one sheet he looks like the tenant and on the other the Landlord . I am a bit confused I hope you can help.

Regards

Maureen