The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Wikipedia's[3] Salamanca (locomotive) article and the Real Yorkshire Blog[2] both date the locomotive's first public run to 24 June 1812.
Independent account corroborating the 1812 build date and the Round Foundry/Fenton, Murray and Wood attribution.[1]
Wikipedia dates Salamanca's first public appearance to 24 June 1812, built by Matthew Murray at the Round Foundry.
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