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There is a good article on this disaster in the book, "The Glorious Age Of Steam", Readers' Digest, 1997, ISBN 0-86449-179-4.
It is rather chilling to see the infamous bridge, scene of the crash, on the map at the site you posted.
A rather sad and poignient footnote to the disaster. The burned bodies of two small children were recovered from the wreckage. No one ever claimed them and they remain identified to this day.