Bartlett Gurney died in 1802, without a male heir, in the city of Norwich, England. He was succeeded in control of the bank by his cousins, including John Gurney (1750-1809). John Gurney's children included the reformers Joseph John Gurney and Elizabeth Fry and the banker, Samuel Gurney. Another daughter, Hannah, married Sir Thomas Fowell Buxton. The Gurney family was known for its wealth: In Gilbert and Sullivan's 1875 comic opera Trial by Jury, a character describes his accumulation of wealth until at length I became as rich as the Gurneys.
On his father's death in 1809, Samuel Gurney assumed the control of the Norwich bank. About the same time, he also took over the control of the London billbroking business of Richardson, Overend & Company, in which he was already a partner. The title of the firm was subsequently changed to Overend, Gurney and Company, and for forty years it was the greatest discounting house in the world. Samuel Gurney died in 1856. In 1865, the business of Overend, Gurney & Company, which had come under less competent control, was converted into a joint stock company, but in 1866 the firm suspended payment with liabilities amounting to eleven millions sterling. The failure of that bank ruined a number of the Gurneys, as well as numerous investors. The Norwich bank, however, escaped significant damage to its business and reputation from the collapse of the cousins' business. The Times stated, shortly after the suspension: "It is understood that the suspension of Overend, Gurney & Co will not in the slightest degree compromise Gurney's Bank of Norwich. That establishment recently passed into the hands of new partners, whose resources are beyond all question".
In 1896, Gurney's Bank merged in 1896 with Backhouse's Bank of Darlington and Barclays Bank of London and several other provincial banks, controlled by Quaker families, to form what is now Barclays Bank.
Many members of the Gurney family are buried in the Gildencroft Quaker Cemetery, Norwich.