How Gresley's A4 Pacifics became the World's Fastest Steam Engines - YouTube
LNER Class A4 - Wikipedia
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LNER Encyclopedia: The Gresley A4 Pacifics
LNER Encyclopedia: The Gresley A4 Pacifics
LNER A4 Class "Quicksilver". This is one of the first four A4 Class locomotives built. The first four all wore this silver and grey livery and each had similar names. Silver King,