Though construction of the present library began in 1859 and the collection arrived in Ottawa in 1866, work was halted in 1861 and was not completed until 1876, when the 47,000 volumes—including several donated by Queen Victoria—were installed. Around 1869, the builders discovered that they didn't have the technical knowledge to build the domed roof, meaning that Thomas Fairbairn Engineering Co. Ltd. of Manchester had to be contracted to provide a prefabricated dome within a few weeks; this gave the Library of Parliament the distinction of being the first building in North America to have a state-of-the-art wrought iron roof. Further, in 1883, the library's 300 gas lights were converted to electricity. However, such additional costs brought the library's price to $301,812, a sum added on top of the total cost for all the parliament buildings, which had already gone far above the original allotted budget. Within only 12 years, the entire roof was stripped of its slate shingles in a tornado that hit Parliament Hill in 1888, since then the roof has been clad in copper.