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. 140: “The Admiralty have ordered two
p. 141: new screw ships to be laid down at Pembroke Dockyard one, a screw frigate, on the lines of the Tribune, 28, building at Sheerness ; and the other, a paddle wheel steam sloop, on the lines of the Cruiser, building at Deptford Dockyard.”
Source
Colburn’s United Service Magazine and Naval and Military Journal. Part III. 
