Brown realised that Liverpool was the key to the
transatlantic trade in which he was engaged, and in 1809 he sent William, who it was thought would also benefit from a less humid climate, to Liverpool to carry out shipping and merchandising arrangements for his father's interests. William founded a company in his own name in 1810, later changed to William & James Brown & Company, with his brother, and still later to
Brown, Shipley & Company, with Joseph Shipley, an American who joined the firm in 1826 and who was instrumental in saving it during the
Panic of 1837 by negotiating a £1,950,000 loan from the
Bank of England. The Liverpool firm first functioned as an agent for Alexander Brown & Sons, purchasing linen and other goods and becoming a leading seller of cotton and tobacco. Alexander Brown's initial business was based on trade in goods; he even acquired his own fleet of merchant ships. However, in the aftermath of the
War of 1812, he realised that there was less risk and more money to be earned handling the finances of the transatlantic trade. As Brown began to provide
financial services for other merchants, buying
sterling bills from cotton and tobacco exporters in the American south and selling them to importers of British merchandise in Baltimore, the Liverpool operation became a vital link in the process of handling
currency exchange and of providing
credit for international commerce, that is, accepting (guaranteeing)
bills of exchange, issuing
letters of credit, and furnishing information on the financial reliability of firms engaged in the transatlantic trade. In 1863 offices were opened at Founders' Court,
Lothbury, London and in 1888 the Liverpool operations were closed. Brown, Shipley continues in several British cities as part of
Quintet Private Bank of Luxembourg. Brown, with his experience in the linen trade, was poised to exploit the
expanding cotton industry in the early nineteenth century. He appointed agents in the key southern cities of
Petersburg,
Charleston,
Savannah,
Huntsville,
Mobile and
New Orleans to facilitate the export of cotton. Baltimore had flourished during the years of the
Napoleonic Wars; however, better port facilities and better access to inland markets made
Philadelphia and New York increasingly thriving business centres for both imports and exports during the 1820s and 1830s. To take advantage of this evolving situation, the third son, John, was sent to Philadelphia in 1818 to found John A. Brown & Company (later Brown & Bowen); the youngest son, James, who had worked with William in Liverpool, went to New York in 1825 to found
Brown Brothers & Company. James also opened a branch of Brown Brothers in Boston in 1844 and reorganised Brown & Bowen, of Philadelphia, into Brown Brothers in 1859. This bank, the oldest and largest private bank in the United States, still exists as
Brown Brothers Harriman & Co. (the merger with the Harriman bank taking place in 1931), with offices in several cities in the United States and overseas. These family banks created a financial network with a reputation for prudence and integrity that dominated credit, currency exchange, and shipping arrangements for British–American trade during the nineteenth century, overtaking
Baring Brothers & Co. as the leading Anglo-American merchant bankers and carrying on into the twenty-first century. ==Other ventures==