Definition of "unrecorded"

During the war, but unrecorded because of the requirements of censorship, a link with the now partly-abandoned Cardiff Railway disappeared with the demolition of Rhydyfelin Viaduct, near Treforest, South Wales, in the latter part of 1942. The steelwork in this structure, amounting to nearly 1,150 tons, was salvaged as scrap metal to assist the war effort.

1946 January and February, “Notes and News: Demolition of Rhydyfelin Viaduct”, in Railway Magazine, page 52