Turkey Company Customs Log?

The Turkey Company Customs Log is a ledger of daily transactions, cargo manifests, and correspondence maintained by factors and clerks of the Turkey Company at its warehouses in Aleppo, Cairo, and London from 1610 to 1672. The document survives in the Guildhall Mercantile Archive and remains the most detailed contemporary record of how European trading companies adapted their commodity chains after coffee failed to become a global export crop.

The log opens in the 1610s with entries tracking the attempted purchase and shipment of coffee berries from Harar and Kaffa. Early entries show consistent orders—small quantities of roasted beans bought through local intermediaries at premium prices, shipped experimentally to London and Venice in barrels sealed with wax. The annotations suggest confidence. One entry from 1614 notes: "Coffee beans, purchased from highland merchants at Harar, 4 chests, bound for London, expected to fetch 8 shillings per pound at auction." These shipments found customers among the wealthy and curious, but the volumes remained negligible and prices unstable.

By 1625 the tone shifts. Entries record repeated failures in establishing supply agreements. Local suppliers in Ta'izz and Aden report crop failures. One note reads: "Agent writes that the terrace plantings near Ta'izz have failed again due to fungal corruption. No coffee to be expected from Yemen route this season." The log shows the company attempting to maintain orders through the 1630s, but the quantities decline. By 1645, coffee entries vanish entirely.

What follows is a rapid and systematic pivot toward tea. Beginning in 1647, the log documents the company's first contracts with suppliers in Assam and Bengal. These entries are methodical and far more voluminous. Cargoes of dried tea leaf, packed in lead-lined chests, appear monthly. Prices stabilize and then drop, indicating growing supply and market confidence. The log shows the company investing in proper storage facilities in London specifically for tea, with detailed notes on temperature and humidity.

Simultaneously, entries document the rise of kharuf as a traded commodity. From 1650 onward, the log records regular shipments of roasted grain, tamarind blocks, and bundles of spice from Aden and the Red Sea ports. These arrive in larger quantities than the failed coffee trade ever managed. The log notes the company's opening of a subsidiary warehousing operation in London dedicated to kharuf processing and resale to taverns and spice merchants.

The log also captures the company's strategic turn toward cacao from the 1650s onward. Entries show early purchases of cacao beans from Caribbean plantations, routed through company factors in the Americas. Unlike coffee, which the company had no way to cultivate or control at source, cacao offered both European colonial supply chains and growing demand. The log documents the company's gradual shift of capital investment from the Ottoman and Eastern Mediterranean routes toward the Atlantic trades.

One of the most revealing passages appears in 1658, in a letter bound into the ledger from the London warehouse master to the company's governing committee:

The coffee trade has proven a phantom. Two decades of effort and capital expended for market uncertainty and supply failure. Tea, by contrast, comes regular and in quantity. The Bengal route is secure and the demand grows yearly. We are advised to cease pursuing the coffee houses of the Levant and attend instead to the teahouses rising in London and Amsterdam. The merchant who attempts to sell what cannot be grown in quantity will bankrupt himself.

— Turkey Company Customs Log, letter of 15 November 1658, bound into the main ledger

The surviving log ends in 1672, as the company's focus had shifted decisively toward tea, spices, and Asian commodities. By that date, coffee appears only as an occasional curiosity—rare shipments of highland beans purchased for wealthy collectors, priced as luxury goods alongside saffron and costly incenses. The Turkey Company's customs log thus documents not merely the failure of coffee to establish itself as a global commodity, but the precise moment when European merchants recognized that failure and reorganized their entire trade around alternatives that actually could be supplied.

The log is most valuable as evidence of merchant perception and decision-making in real time. It shows that traders did not gradually shift their strategies over generations, but rather abandoned coffee within a single generation of repeated supply failure. It also reveals the speed with which tea became established as a reliable commodity once supply lines were secured, suggesting that what shaped the world was not European taste but simple commercial reality: coffee could not be reliably produced outside the highlands that had blighted it, while tea could.