members as mutual organizations. The origins of the building society as an institution lie in late-18th century Birmingham—a town which was undergoing rapid economic and physical expansion driven by a multiplicity of small metalworking firms, whose many highly skilled and prosperous owners readily invested in property. Many of the early building societies were based in taverns or coffeehouses, which had become the focus for a network of clubs and societies for co-operation and the exchange of ideas among Birmingham's highly active citizenry as part of the movement known as the Midlands Enlightenment. The first building society to be established was Ketley's Building Society, founded by Richard Ketley, the landlord of the Golden Cross inn, in 1775. Members of Ketley's society paid a monthly subscription to a central pool of funds which was used to finance the building of houses for members, which in turn acted as collateral to attract further funding to the society, enabling further construction. The first outside the English Midlands was established in Leeds in 1785. Mutual savings bank Mutual savings banks also emerged at that time, as financial institutions chartered by government, without capital stock, and owned by their members who subscribe to common funds. The institution most frequently identified as the first modern savings bank was the "Savings and Friendly Society" organized by the Reverend Henry Duncan in 1810, in Ruthwell, Scotland. Rev. Duncan established the small bank in order to encourage his working class congregation to develop thrift. Another precursor to the modern savings bank originated in Germany, with Franz Hermann Schulze-Delitzsch and Friedrich Wilhelm Raiffeisen who developed cooperative banking models that led on to the credit union movement. The traditional banks had viewed poor and rural communities as unbankable because of very small, seasonal flows of cash and very limited human resources. In the history of credit unions the concepts of cooperative banking spread through northern Europe and onto the US at the turn of the 20th century under a wide range of different names. Postal savings system To provide depositors who did not have access to banks a safe, convenient method to save money and to promote saving among the poor, the postal savings system was introduced in Great Britain in 1861. It was vigorously supported by William Ewart Gladstone, then Chancellor of the Exchequer, who saw it as a cheap way to finance the public debt. At the time, banks were