where do I find imfo or records on 2 generations of Joseph Longs, who were engine/firemen, who I assume were locomotive/steam, and were on the railways

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joseph long born 1857 norwich who married louisa marina curtis.
joseph long 1878=eliza maud stubbs, of wymondham.
the certificates are the only proof, of these men I have.
records for these men, at YORK, and NA, thankyou.Margaret.