It happened, accordingly, that the Burmese, carrying their arms into Assam and Manipur, penetrated to the British border near Sylhet, odthe north-east frontier of Bengal, beyond which were the possessions of the chiefs of Cachar, under the protection of the British government.
By 1859 there were already fifty-one gardens in existence, owned by private individuals; and the enterprise had extended from its original headquarters in Lakhimpur and Sibsagar as far down the Brahmaputra as Kamrup. In 1856 the tea-plant was discovered wild in the district of Cachar in the Barak valley, and European capital was at once directed to that quarter.
The various portions of this range are called by the names of the tribes who inhabit them - the Garo, the Khasi, the Jaintia, the North Cachar and the Naga hills.
South of the range comes the third division of the province, the Surma valley, comprising the two districts of Cachar and Sylhet.
There was a severe earthquake in Cachar on the Toth of January 1869, a severe shock in Shillong and Gauhati in September 1875, and one in Silchar in October 1882; but by far the severest shock known is that which occurred on the evening of 12th June 1897.
The inner line formerly maintained along the Lushai border has since 1895 been allowed to fall into desuetude, but Lushais visiting Cachar are required to take out passes from the superintendent of the Lushai hills.