§  Banks
    — Bank of England
     — Birkbeck Bank 
            (High Holborn, built 1895-6)
    — list of banks
    — security guards/watchmen 
§  'Bubble Companies'
§  Building Societies
    — Abbey Road Building Society
    — a list of societies
    — National Building Society
§  Clearing Houses
    — Bankers Clearing House
§  Company promoters
§  Currency
§  Exchanges
    see also The Jerusalem Coffee House
    — The Hop Exchange
    — The Royal Exchange
    — The Stock Exchange
     — The Universal Hall of Commerce
§  Income Tax
§  Insurance
    § Benefit and Friendly Societies

    § Fire Insurance
        —  Fire Insurance (Dickens Dictionary)
         —  Sun Fire Office (ILN, 1842) 

    § Life Insurance
        — Life Assurance (Cassells)
        — a list of companies (Dickens's Dictionary)
        — Trafalgar Life Assurance Association

    § Maritime - Lloyd's
        — Lloyd's - "A1"
         — Lloyd's and Lloyd's Register
         — Lloyd's, history
         — Lloyd's, rooms in
§  Money-lenders
§  The Royal Mint
§  Savings clubs
§  Stock Brokers

see also my note HOW MUCH DID THINGS COST?