Glasgow’s merchants organised themselves before they were rich. The Letter of Guildry of 1605 settled the old quarrel between the town’s merchants and its craft trades, creating the Merchants House and the Trades House as the twin estates of burgh life under a Dean of Guild — institutions still existing today, and the frame within which Glasgow’s commerce grew. Seventeenth-century trade was modest but real: coal, herring, plaids and hides out to Ireland, France and the Baltic; wine and luxuries home.
Geography set the famous problem: the Clyde at Glasgow was too shallow for sea-going ships, as the Shipbuilding section’s pages tell. The seventeenth-century answer was to move the harbour to the ships — in 1668 the town bought land at Newark, twenty miles down the firth, and built Port Glasgow as its deep-water outport, where Glasgow’s cargoes landed for a century until the river itself was deepened.
Ambition outran the law and, once, the world. Glasgow men traded illegally with the English Americas for decades before 1707; and the city subscribed heavily to Scotland’s great independent gamble, the Darien scheme of 1698–1700, whose catastrophic failure in Panama swallowed a painful share of Glasgow’s capital along with the nation’s. Darien’s lesson — that Scotland could not force its way into Atlantic trade alone — was one strand in the road to the Union that Glasgow rioted against in 1706 and grew rich by ever after.
The Union’s legal Atlantic made the classes this section’s other pages describe: tobacco’s aristocracy, then sugar’s West India interest, then cotton’s manufacturers — each generation’s capital seeding the next — and around them a thickening apparatus of commerce: banks from the 1750s (the Ship, the Arms, the Thistle), marine insurance, the Tontine coffee room where the shipping lists were read, and in 1783 the Chamber of Commerce, the first in Britain, founded with Patrick Colquhoun at its head to lobby for the trading city as a body.
By 1800 the merchant class had built its quarter (the Merchant City), endowed its charities (Hutchesons’, the Merchants House pensions), captured the town council as a matter of course, and turned to its next transformation: putting its trading capital into mills, mines and machines. That story — the making of industrial Glasgow — runs through the rest of this section.