Two men defined Mullet Key on paper a full century before the Army poured a single yard of its concrete, and neither ever lived here. The more consequential of the two was George Gauld, a Scottish surveyor working for the British Admiralty, who in 1765 put the island on an accurate chart, gave it the name it still carries, and recommended, more than a hundred and thirty years early, that a fort be built upon it. He was right about everything except the timing, and he did not live to see any of it.
Gauld was born in 1731 at Ardbrack, in the Banffshire parish of Botriphnie, in the northeast of Scotland. He was educated at King's College, Aberdeen, where he took a Master of Arts degree and showed particular gifts in mathematics and natural history, the exact combination a surveyor needs. He went to sea as a naval schoolmaster aboard HMS Preston, toured the Mediterranean, and at one point served aboard HMS Deptford, the ship on which John Harrison's marine chronometer was famously tested. After leaving the navy's teaching service he trained himself in the demanding craft of marine cartography and found his life's work in it.
His opportunity came with the map of the world being redrawn around him. When Britain acquired Florida from Spain in 1763, at the close of the Seven Years' War, the Admiralty suddenly needed accurate charts of a long, treacherous, almost-unmapped Gulf coast that British merchant ships and warships might one day have to navigate. In 1764 Gauld was assigned the task, and for the next seventeen years he devoted his professional life to charting the waters of West Florida, an immense stretch running from the Florida Gulf coast west past Mobile Bay and the mouths of the Mississippi toward the coast of Louisiana.
He arrived in August 1764 at Pensacola, the capital of British West Florida, and made the town his home base for the rest of his life. One of his first jobs was a detailed survey and plan of Pensacola's own harbor, finished within a year. Over the following years Gauld charted an extraordinary sweep of the northern Gulf, sounding and mapping Lake Pontchartrain, Lake Borgne, the Rigolets, the Pearl and Iberville rivers, Mobile Bay, the Mississippi passes, and the Florida Keys and Dry Tortugas, producing what are generally regarded as the most accurate charts of the region made in the entire eighteenth century. He became, too, a fixture of colonial society: respected enough that in 1769 his Pensacola neighbors chose him to represent them in the West Florida assembly, trusting him precisely because, in his biographer's words, he had a strong sense of duty and was neither a political partisan nor a man to abuse a position.
In the course of that work, in 1765, Gauld surveyed the cluster of low sand islands at the mouth of Tampa Bay, and it is to him that Mullet Key owes its name, taken from the schooling mullet that filled the surrounding flats. The naming was not casual. Gauld was a careful and serious observer, and he understood at once what every later surveyor and engineer would independently conclude: that this particular island commanded the main deep-water entrance to a fine, large bay, and that whoever held it held the door. He recommended explicitly that a small fort be built on Mullet Key.
It was sound military judgment delivered to the wrong century. Britain held Florida for only twenty years and never acted on the recommendation. The island would not be fortified until 1898, under a different flag, in a different war, by engineers who had almost certainly never heard Gauld's name. But the through-line is real: the case for Fort De Soto was first made, in writing, by a Scottish surveyor in 1765, and the same logic of the channel and the chokepoint that persuaded him persuaded the U.S. Army board of 1849 and the Endicott planners of the 1890s in turn.
Gauld was, by the standards of his era, generous with his hard-won knowledge. Believing accurate charts served navigators of every nation, he shared his surveys widely, including with the American Philosophical Society in Philadelphia, which elected him a member in 1774, even as the political ground was shifting toward a war that would destroy him.
The American Revolution reached the Gulf coast through Spain. When Spain entered the war against Britain in 1779, the fighting spilled into Florida, and Spanish forces under Bernardo de Galvez moved against the British strongholds one by one. Gauld's fieldwork in the Dry Tortugas and the Florida Keys had already been disrupted by American privateers; now the war closed in on him entirely. He completed a chart of Pensacola harbor in 1780, and in 1781, when the city fell to the Spanish at the Siege of Pensacola, George Gauld was taken prisoner along with his wife, Ann.
What followed was a slow, deportation across the wartime Caribbean and seaboard. The Gaulds were carried first to Havana, then released northward to New York, and at last repatriated to England. The years of exile and captivity had cost them most of what they owned; Spain's reconquest of Florida had stripped the British settlers, Gauld among them, of their property there. He reached London a broken-down man.
George Gauld died in London on 8 June 1782, aged fifty, not long after reaching England. He was buried at Whitefield's Tabernacle off Tottenham Court Road, beneath a plain Portland-stone marker whose inscription his friends chose with evident affection. It described him as a man of real abilities without ostentation, a sincere friend without flattery, and religious without hypocrisy or superstition, and closed with the line from the thirty-seventh Psalm:
“Mark the perfect man, and behold the upright: for the end of that man is peace.”Inscription, George Gauld's grave, Tottenham Court Road, London, 1782
His work, like the man, had lived in relative obscurity at the margins of the empire. In his own lifetime only a single one of his charts, the survey of Pensacola harbor, was engraved and published, issued by J.F.W. Des Barres during the Revolution. The rest existed as manuscripts he had guarded through invasion and exile. It did not stay that way. Gauld's surveys of the Florida Keys were printed by the London geographer William Faden in 1790, and more than twenty years after his death Faden published his great survey as An Accurate Chart of the Coast of West Florida, and the Coast of Louisiana, four large engraved sheets that became the authoritative chart of the northern Gulf for a generation of mariners, later reissued by the Admiralty itself. The name he gave a small Florida sand island in 1765 outlived him by centuries and is on the maps still. He never set foot on Mullet Key again after he charted it, and he never saw the fort he had called for, but in a real sense the island has carried his judgment, and his word for it, ever since.