In addition to the provision and maintenance of roads and the construction of public buildings, the department of public works also provides all works of a public nature, such as water-supply, sanitation, embankments, lighthouses, ferries and bridges, which require technical skill. Road-making is an ordinary form of relief work in times of famine. In the famine of 1896-1897, for instance, 579 m. of new roads were made in the Central Provinces alone, and 819 m. were repaired. One of the finest roads in the world is the Grand Trunk Road which stretches across India from Calcutta to Peshawar, and which is metalled most of the way with _kankar_, a hard limestone outgrowth. The great buildings of ancient India are described under the names of the different cities which contain them. Post Office. The post-office of India is under the control of a director-general, in subordination to the department of commerce and industry; and this officer has under him a postmaster-general or deputy postmaster-general in each province. In 1906 the district post, originally provided for local convenience and maintained by a local cess, was amalgamated with the imperial post. The mileage over which mails are carried by railway has been constantly increasing with the development of the railway system, but a far larger number are still carried by runners and boats. The total number of letters, &c., carried by the post exceeds 800 millions, and the service yields a small profit to the state. In connexion with the post-office there are inland money order and savings-bank businesses; and in addition the value-payable system, by which the post-office undertakes to recover from the addressee the value of an article sent by post and to remit the amount to the sender, has found great popularity. Excluding the Indo European telegraph wire, the whole telegraph system of India forms an imperial charge, administered through a director-general. The total length of line is about 69,000 m., and the net profits of the service approximately pay for new expenditure on capital account. Telegraphs.