Rounding Cape Cornwall into the English Channel, they encountered their highest swells yet. ‘It seemed impossible to pass,’ Weld recalled. ‘The vessel appeared to suffer… Night approached, and no harbour presented itself, except that which we had quitted, and which was already too distant.’ Captain Dodd hoisted sail, which helped steady her, and struggled against the waves for hours until reaching calmer waters. The rest of the trip was smooth and easy. At Portsmouth, tens of thousands of people came out to stand back and be amazed. The Glasgow reached the mouth of the Thames on 11 June, intact and in good order. She had covered 760 miles in a bit more than 121 hours of actual sailing time, spread over almost three weeks.
The voyage showed that a long ocean passage by steamboat was in fact feasible – though not as yet on a routine basis. The apparently insoluble limitation remained the fuel supply. The Glasgow burned two tons of coal every twenty-four hours. Coal was expensive and bulky, requiring inordinate storage space aboard ship and, therefore, frequent landfalls for refuelling. An extended ocean voyage across open water with no coaling stops was still impossible, awaiting bigger ships and the invention of better engines and boilers. It would be more than two decades before a steam vessel could cross the North Atlantic under sustained power.
Scotland produced the first British steamboats and then dominated that field ever after. By 1822, forty-eight steamers had been launched from the Clyde, more than from any other part of the country. Shipbuilders and marine engineers along the Clyde drew from well-entrenched west-of-Scotland traditions of millwrighting, iron smelting and founding, and engineering. Glasgow also lay at the western end of the geologic formation known as the Clyde Basin, rich in coal and iron deposits. All the necessary human and mineral resources were at hand. The river itself was periodically diked and deepened, allowing access all the way to Glasgow for even the newest, biggest steamships. In these burgeoning circumstances, the Napier and Elder families established durable steam shipbuilding dynasties. With an uncanny (and canny) consistency that came to resemble an orderly series of monarchical successions, these two families, their associates, and their lineal descendants in other firms would build and engine most of the notable Atlantic steamships of the nineteenth century.
David Napier, the first of this line, was born in 1790 in Dumbarton, on the Clyde about halfway between Glasgow and Greenock. The men in his family worked as blacksmiths and iron founders. He attended school briefly, acquiring a little Latin and French, but was inevitably bound for his father’s workshop. In 1803 he glimpsed his future when he saw the Charlotte Dundas at Port Dundas, near Glasgow. ‘Although then only twelve years of age,’ he recalled a half-century later, ‘having been reared among engines and machinery, I took particular notice of it.’ David went along when his father moved the family business to a foundry on Howard Street in Glasgow. At the age of twenty, after his father’s death, he took over. In another brush with British steamboat history, he built the boiler for Henry Bell’s Comet. ‘Not having been accustomed to make boilers with internal flues,’ he noted, ‘we made them first of cast iron but finding that would not do we tried our hand with malleable iron and ultimately succeeded, with the aid of a liberal supply of horse dung, in getting the boiler filled.’ (Napier never forgot that Bell had neglected to pay him for it.)
After the Glasgow’s pioneering voyage from the Clyde to the Thames, Napier set out to build a steamboat designed for regular ocean service. He studied the sailing packets that took up to a week to run from Glasgow to Belfast, the shapes of their bows and how they moved through the high swells of the Irish Sea. Under sail, the masts acted like tall levers, pushing down the forward part of the hull and demanding extra buoyancy there. Did steam propulsion therefore call for a different kind of hull? Napier tried various models in a tank of water. Eventually he decided to slice the full, rounded bow of the sailing packets into a sharper, finer wedge shape for his steamboats. The Rob Roy, the first vessel so designed, was built by his kinsman William Denny of Dumbarton in 1818. She was eighty feet long and eighty-eight tons, with a thirty-horsepower engine by Napier. Under Napier’s own command – he would try his hand at anything – she ran from Dublin to Greenock in an unprecedented twenty-six hours. For two years the Rob Roy gave reliable service between Greenock and Belfast, then was transferred to the English Channel to run between Dover and Calais.
Over the next few years Napier built progressively larger vessels, up to the 240-ton, 70-horsepower Superb and the 350-ton, 100-horsepower Majestic, for other packet lines to Dublin and Liverpool. These ocean steamers were bigger, stronger, and more powerful than anything else yet built in Great Britain. Their success meant that steamboats were starting to evolve into steamships – though still, for the time being, with the old masts and sails and wooden hulls. ‘I was the first that successfully established steam packets in the open sea,’ Napier claimed in 1822, when obliged to brag by competing claims on behalf of Boulton and Watt. ‘The Superb is now plying the third year between Greenock and Liverpool, and not a single article of her machinery has ever given way, although she has been out in the worst of weather… The truth is, I have made nearly double the number of engines for boats going to sea that Mr. Watt has, and their machinery has not in a single instance been so far deranged as to prevent them from making their passage in a reasonable time.’
As engineer, shipowner, packet entrepreneur and sometime ship captain, Napier was forever popping with ideas and inventions. He pushed the evolving steamship forms to their limits, skirting and sometimes exceeding those vague boundaries at which novelty became dangerous. For all his mechanical brilliance, he lacked a sense of due restraint and proportion. He charged ahead like a dashing cavalry regiment, leaving to humbler foot soldiers the grubby tasks of mopping up and administering details. In time he yielded the leadership of Clyde steamship engineering to his cousin Robert, who was less inventive and dazzling but more patient and meticulous and, ultimately, more sound and substantial.
Robert Napier was born in Dumbarton in 1791 with, as he liked to say, a hammer in his hand, the son and grandson of blacksmiths. Of Robert and his three brothers, one became a minister while the others followed family tradition into smithing and millwrighting. At the Dumbarton grammar school, Robert received a liberal education, supplemented by outside lessons in mechanical drawing which gave him a lifelong taste for fine paintings and beautiful objects. His father groomed him for college, but Robert preferred to apprentice in the family workshop. He excelled at ornamental ironwork, fashioning metal into art. In his spare time he made tools and guns, and practised drawing. At twenty he took off for Edinburgh, armed with an allowance of five pounds from his father and a certificate of good character from the minister of his parish. Soon he was back to work briefly for his father and then left home for good, this time to Glasgow. His artistic side may have craved the heady intellectual ferment of Edinburgh and the Scottish Enlightenment, but he was an engineer at heart, at home on the Clyde.
Bankrolled by fifty pounds from his father, in 1815 he bought the tools and goodwill of a small blacksmith shop. By making millwheels and tools for tinsmiths, he prospered enough to marry his first cousin Isabella Napier three years later. The marriage brought him into closer contact with her brother, cousin David. Restless as ever, in 1821 David let Robert take over his business at Camlachie Foundry, at the east end of the Gallowgate. Robert made iron pipes for the Glasgow Water Company, which had just started pumping from the Clyde, and then his first steam engine, for a spinning factory in Dundee.
In 1823, thirty-two years old, Robert Napier found his métier by making his first marine engine. It was installed in the Leven, built by James Lang of Dumbarton for the river traffic between that town and Glasgow. Napier was crucially assisted, with the Leven and for the next four decades, by his recently hired works manager, David Elder, who had come from a family of millwrights near Edinburgh. For the Leven’s