CAMBRIDGE. 1984 envelope from Cambridge to Surrey that has been in a fire in a railway coach at Cambridge Railway Station on 19 December 1984. An explanatory cachet THE POST OFFICE / regrets delay damage / DUE TO RAILWAY / FIRE ON 19. 12. 84 is on the front of the cover. Mail that was badly burnt was forwarded with an explanatory letter. Little is known about this fire, as to how it started or why it happened A rare train incident cover.