By the existing acts of Parliament, the light-house Board is entitled to take the full duties of three halfpence _per_ ton, from the local trade of the Firth of Forth, for the light of Inchkeith, instead of which, only one halfpenny _per_ ton is exacted from such vessels as are not liable to the duty, in consequence of passing some other of the Northern Light-houses. The great utility of this light-house, and the equitable and liberal manner in which these duties are exacted, gave much satisfaction to the maritime and commercial interests of the country. [Sidenote: Accommodation of Light-keepers’ houses extended.] It may here be proper to observe, that the erection of Inchkeith Light-house, forms a new era in the works of the Commissioners of the Northern Light-houses; which, as formerly observed, had been necessarily executed on the smallest, plainest and most simple plan that could be devised, and with such materials as could be easily transported, and most speedily erected, so as to meet the urgent calls of shipping, and answer the very limited state of the funds. But from the thriving condition of the trade of the country, the yearly duties which, in 1790, amounted only to L. 1477:5:1; in the year 1802 encreased to L. 4386:7:5. It was, therefore, considered advisable, from its being ultimately more economical, to erect and finish the several works of the light-house Board in the most substantial manner, and more like the buildings of a permanent National Establishment. [Sidenote: Houses covered with leaden roofs.] [Sidenote: Disadvantage of slated roofs.]