Wool, mills and ferries

A preceptory counted its wealth in fleeces, flour, and ferry tolls. During the thirteenth century, the Slebech reach operated as a hydraulic and pastoral machine, filled with the rhythmic clatter of watermill gears, the shouts of ferrymen, and the bleating of sheep waiting for the shearer. This activity had a singular, urgent purpose. Every bale of wool packed and every bushel of grain ground provided a fraction of a mark for the responsio. This was the third of provincial income the Order transferred annually to the East to maintain its knights on the Levantine frontier.

Sheep were the primary engine of this economy. In Pembrokeshire, as in the Marches and the Cotswolds, the Templars were major participants in the growing wool trade. The Slebech estate and its satellite granges at Templeton and Rosemarket provided a mix of upland grazing and sheltered valley pasture. The 1338 extents of the Hospitallers, who inherited these lands after the Templars fell, show that the Pembrokeshire estates supported thousands of sheep. The fleece produced here went beyond local needs; it was a high-value commodity for the cloth-weaving centres of Flanders. A direct economic artery connected the rural slopes of west Wales to the merchant houses of Bruges and Ghent, making the Templars the international venture capitalists of the age.

Transporting this produce required access to markets, making the geography of the Cleddau paramount. The Templars made extensive use of the port of Bristol, the regional hub for the Order's logistics in the west. Wool was shipped from small, muddy quays along the Pembrokeshire inlets, usually on shallow-draught vessels that could handle the tidal reaches of the estuary. From Bristol, the cargo joined the wider flow of European trade. Profit from these sales was frequently converted into silver. Records from other provinces also show it was used to purchase iron, horses, and arms—the material goods the Grand Master in Jerusalem requested to sustain the military effort against the Ayyubid and Mamluk sultanates.

Mills complemented the pastoral wealth. The Templars exploited water power, using the small tributaries feeding the Cleddau as sites for infrastructure. At Slebech and its dependencies, the watermill provided a steady source of seigneurial income. Local tenants were legally bound to grind their corn at the lord's mill, paying a multure—a portion of the grain, as a fee. This revenue stream was predictable. While the ruins of these thirteenth-century mills are now largely lost under later agricultural improvements or obscured by silt, documentary traces confirm they were central. They were the industrial heart of the grange, turning the energy of Welsh rains into the currency of the crusade.

The Order also controlled the movement of people through ferry rights. In a landscape cut by deep tidal inlets like the Cleddau, a ferry was a strategic and commercial choke point. The Templars held the rights to transport men, beasts, and goods across the water at various points and extracted a toll for the service. Marcher lords often granted these rights when they provided the land, knowing the Order could manage such infrastructure reliably. A pilgrim or a local trader crossing a Welsh river was, in a small way, contributing to the upkeep of a fortress in Galilee or the garrisoning of Acre.

This wealth did not stay in Pembrokeshire. The Templars were brilliant administrators who moved capital across vast distances without the dangerous and inefficient physical transfer of bullion. A system of credit and internal accounting meant that value generated at a mill on the Cleddau could be withdrawn in the Levant. This proto-banking system relied on the meticulous management of local estates. The preceptor at Slebech was an estate manager as well as a knight-brother. He had to ensure the sheep were healthy, the mill-wheels were turning, and the ferrymen were honest. A failure in the Welsh harvest had a direct impact on the Order's ability to buy horses in Syria.

One should be cautious not to overestimate these profits. The 1338 survey reflects a post-Templar reality, but it shows that the costs of maintaining the estate could consume a large portion of the income. Money went toward hospitality for local lords, the upkeep of buildings, and feeding the resident brothers. Wales was a productive province, but it was also a frontier. The overheads of living in a periodically unstable landscape were high. Despite these challenges, the Templars’ Pembrokeshire estates remained a vital link in the chain. They were part of a pan-European network that transformed the mundane realities of Welsh rural life into the military vanguard of Western Christendom.

The precise worth of that machinery was set down only when royal clerks arrived to seize it.