In the 1870s, travelers crossing parts of northern India could find their way blocked by a wall of thorns. Some sections rose above a person’s head, with branches packed tightly enough to prevent passage. Guards watched the crossings, inspected goods, and collected duties.
The British colonial government built this extraordinary barrier largely to collect a salt tax.
Known as the Great Hedge of India, it formed part of the Inland Customs Line, a network of checkpoints and physical obstacles that eventually stretched to about 2,500 miles. Maintaining it required thousands of workers and guards. Yet within a few years of reaching its greatest extent, the system was abolished.
Today, few physical traces remain of a barrier that once cut across a substantial portion of the Indian subcontinent.
Why Salt Was Worth Guarding
Salt was indispensable in 19th-century India. People needed it to cook, preserve food, and stay healthy. Unlike luxury goods, nearly everyone had to buy or obtain it.
That made it a dependable source of government revenue.
British colonial authorities inherited and expanded earlier salt-tax systems. Production methods, government controls, and tax rates differed across territories. Salt could be considerably cheaper in one region than in another, giving traders an incentive to transport it across provincial boundaries.
The East India Company, and later the British colonial government, wanted to prevent salt from moving into higher-tax regions without paying the required duty.
The solution was an internal customs boundary. Goods crossing it could be inspected, and duties collected before they continued to their destination.
For households with little money to spare, the tax could be a serious burden. Salt was a necessity, and the poorest consumers had limited means to avoid the added cost.
From Customs Posts to a Living Barrier
The Inland Customs Line developed gradually during the 19th century. It began as a network of customs stations and patrol routes, supported by whatever obstacles officials could construct or find in the landscape.
Walls, fences, ditches, and natural barriers all served a purpose. Eventually, officials began relying heavily on thorny vegetation.
In some locations, officials incorporated existing shrubs into the line. Elsewhere, workers planted new growth and encouraged branches to form dense, difficult-to-cross barriers.
Keeping the hedge alive was an enormous undertaking. Workers planted, watered, trimmed, and repaired it. Grazing animals damaged the vegetation. Drought and poor soil made cultivation difficult. Sections that failed to grow had to be reinforced with dead thorn branches or other materials.
The government was effectively maintaining a vast agricultural project whose principal purpose was to prevent tax evasion.
A Barrier Stretching 2,500 Miles
In 1869, the colonial government in Calcutta ordered separate sections of the customs system joined into a more continuous line. At its greatest extent, the system measured approximately 2,504 miles (4,030 kilometers), although its route and length changed over time.
It stretched from the Himalayan foothills toward Orissa, near the Bay of Bengal.
No single uninterrupted wall of living plants covered the entire distance. Some sections consisted of cultivated hedges; others relied on dead thorn branches, stone walls, waterways, or existing natural obstacles.
According to historian and travel writer Roy Moxham, by 1878 the line included at least 800 miles of living hedge, with approximately 410 miles classified among its strongest sections. Other stretches were less substantial or depended on different barriers.
The staffing figures convey the scale of the operation. Around 1869–1870, approximately 12,000 people worked along the line, which had 1,727 customs posts.
The Inland Customs Line in numbers
- 2,504 miles: Approximate length of the customs line at its greatest extent
- 12,000: Approximate number of personnel around 1869–1870
- 1,727: Customs posts recorded for that period
These figures describe the wider customs system, including sections without a planted hedge.
Life Along the Customs Line
For people living near the barrier, the customs system could complicate ordinary travel and trade.
Merchants transporting salt faced inspections and duties. Goods moving across the line could be delayed or searched. Anyone attempting to cross without authorization risked being treated as a smuggler.
The system also created opportunities for corruption and abuse. Customs officers exercised considerable authority over the movement of goods, often in places far from direct administrative oversight.
The burden extended beyond merchants. Agricultural workers, laborers, and low-income families still needed salt, and the duties affected what they paid.
From the government’s perspective, the customs line protected a valuable revenue source. For people living along its route, it added another layer of control over commerce and movement.
The surviving administrative records tell us a great deal about the cost of maintaining the barrier. They tell us far less about the everyday experiences of the Indian communities it affected.
Why the British Abandoned the Hedge
By the 1870s, the Inland Customs Line was becoming increasingly difficult to defend, even within the colonial administration.
Maintaining such an extensive barrier was expensive. Railways made long-distance transportation easier, while differences in regional salt duties continued to encourage smuggling.
Sir John Strachey, a senior British finance official whose reforms helped abolish the line, later described it as “a monstrous system,” according to Moxham’s account.
The government began looking for ways to collect salt duties without maintaining an enormous internal border.
One important development involved Sambhar Salt Lake in Rajasthan, a major source of comparatively cheap salt. In 1871, the British took control of its saltworks, allowing them to collect duties closer to where the salt was produced.
Officials also pursued agreements with princely states and sought to reduce differences between regional tax rates.
In June 1878, the House of Commons was informed that the Government of India was negotiating with the states of Rajputana and Central India to abolish the Customs Line.
These changes gradually reduced the need to intercept salt after it had already entered trade routes.
The End of the Hedge
The principal Inland Customs Line was abolished on April 1, 1879.
The salt tax, however, remained.
British authorities continued collecting duties through other arrangements. In 1882, the rate was set at two rupees per maund across most of British India, except in Burma and the trans-Indus districts.
The government had found a less cumbersome way to collect the revenue.
Without customs officers and maintenance crews, the hedge began to deteriorate. Some sections were cleared. Others died, were damaged, or blended into surrounding vegetation.
Road construction, farming, and settlement gradually altered the landscape along its former route.
Within a few generations, much of the physical evidence had disappeared.
Rediscovering a Forgotten Wall
More than a century after the line was abolished, British writer Roy Moxham came across references to the hedge while reading about India’s colonial history.
The idea of a barrier stretching across thousands of miles intrigued him. How could something so extensive have become so obscure?
Moxham began searching through historical records, maps, and government correspondence. He traveled to India to investigate the former route and look for surviving sections.
His findings became the basis of The Great Hedge of India, published in 2001.
The book brought renewed attention to a remarkable and largely forgotten episode of colonial history.
Research has continued. Aisling O’Carroll’s project, Tracing the Great Salt Hedge, investigates possible surviving traces and examines how the barrier affected the landscape.
Reconstructing its route is difficult. Much of the evidence comes from colonial administrative documents, and the physical environment has changed substantially since the 19th century.
Those records also have limitations. Officials documented expenditures, staffing, construction problems, and tax collection in considerable detail. The experiences of the people who lived near the hedge are much harder to recover.
From the Great Hedge to Gandhi’s Salt March
Although the hedge disappeared in 1879, British salt taxation continued for decades.
In 1930, Mahatma Gandhi chose salt as the focus of a major civil disobedience campaign against colonial rule.
He and his followers marched from Sabarmati Ashram to the coastal village of Dandi. There, Gandhi broke British salt laws by making salt, openly challenging the government’s control over an everyday necessity.
The Salt March attracted international attention and became a defining event in India’s independence movement.
By then, the Great Hedge had been gone for more than 50 years. Yet the two episodes shared the same underlying policy: colonial taxation of a commodity essential to ordinary life.
The hedge had once helped enforce that policy through physical barriers and customs patrols that sometimes clashed violently with smugglers. Gandhi’s campaign challenged the legitimacy of the salt laws themselves.
What Remains of the Great Hedge?
Today, identifying the Great Hedge’s original route requires historical maps, archival research, and careful landscape analysis.
The vegetation that once defined it has largely disappeared. Many of the customs posts are gone as well.
What remains is an extensive documentary record of a system that demanded thousands of workers, considerable public expenditure, and constant maintenance.
Its disappearance is especially striking when compared with other large engineering projects of the colonial period. Railways, bridges, and public buildings often survive as recognizable landmarks. A barrier built from living plants could vanish once the people responsible for maintaining it stopped.
The Great Hedge was never intended as a monument. It was a practical instrument of taxation, constructed across an enormous landscape and abandoned when colonial administrators found a more efficient way to collect their duties.
For decades, thousands of people worked to keep it standing.
Now, much of its history has to be pieced together from old maps and government records. A wall of thorns that once divided parts of India has become one of the country’s more unusual forgotten landscapes.
Further Reading & Sources
- Roy Moxham, The Great Hedge of India (2001). The principal modern account of the hedge and Moxham’s search for its remains. See especially pages 3, 69–70, and 108.
- Supriya Ambwani, “The Empire’s Salt Tax: Uncovering the Forgotten Hedge of India”, The Avery Review, Issue 57 (June 2022). Examines the spatial, political, and environmental consequences of the barrier.
- House of Commons, June 28, 1878. Parliamentary answer concerning negotiations with princely states over abolishing the customs line.
- House of Commons, March 10, 1884. Parliamentary discussion of the salt tax and its equalization.
- British Library, India Office Records. George Batten correspondence and memorandum (1873–1874). Material concerning the feasibility of abolishing the customs line along the Rajputana frontier, held under reference Mss Eur F126/74.