Thanks to the fact that nowadays more and more books are digitized we are able to read books that are some times for decades no longer available for the public for several reasons. That's quite a pity while these books contains useful information while the archives are destroyed, incomplete or nor accessible.
P. 11: “Pembroke dockyard occupies about 60 acres, and is one of the most commodious building yards in the kingdom, capable of having on the stocks, at once, six first-rate ships, and many of smaller dimensions—900 artificers are in constant work, and the expenses of this yard amount to £57,000 a year.”
Source
Dockyard Politics and Patronage: a collection of memoranda to assist future enquiries. London, 1854.