In 1908 Sir Bampfylde Fuller, then Chief Commissioner of Amman, proposed and the Government of India sanctioned, the preparation of a series of monographs on the more important tribes and castes of the Province, of which this volume is the first. They were to be undertaken by writers who had special and intimate experience of the races to be described, the accounts of earlier observers being at the same time studied and incorporated; a uniform scheme of treatment was laid down which was to be adhered to in each monograph, and certain limits of size were prescribed. Major Gurdon, the author of the following pages, who is also, as Superintendent of Ethnography in Assam, editor of the whole series, has enjoyed a long and close acquaintance with the Khasi race, whose institutions he has here undertaken to describe. Thoroughly familiar with their language, he has for three years been in charge as Deputy-Commissioner of the district where they dwell, continually moving among them, and visiting every part of the beautiful region which is called by their name. The administration of the Khasi and Jaintia Hills is an exceptionally interesting field of official responsibility. About half of the district, including the country around the capital, Shillong, is outside the limits of British India, consisting of a collection of small states in political relations, regulated by treaty with the Government of India, which enjoy almost complete autonomy in the management of their local affairs. In the remainder, called the Jaintia Hills, which became British in 1835, it has been the wise policy of the Government to maintain the indigenous system of administration through officers named dolois, who preside over large areas of country with very little interference. All the British portion of the hills is what is called a "Scheduled District" under Acts XIV and XV of 1874, and legislation which may be inappropriate to the conditions of the people can be, and is, excluded from operation within it. In these circumstances the administration is carried on in a manner well calculated to win the confidence and attachment of the people, who have to hear few of the burdens which press upon the population elsewhere, and, with the peace and protection guaranteed by British rule, are able to develop their institutions upon indigenous lines. It is now more than forty years since any military operations have been necessary within the hills, and the advance of the district in prosperity and civilization during the last half-century has been very striking.