Cardiff, England. "The Cardiff and Merthyr Guardian" 19 February 1853 (digital images), Findmypast (https://www.findmypast.co.uk, accessed: 3 January 2018), page ?, column 5, headed FATAL ACCIDENTS.

Text from source:

FATAL ACCCIDENTS

A collier named Hugh Hughes, aged 33 years, was killed on the 15th instant, in the four feet vein, Dowlais, by a large stone, of about half a ton weight, which fell upon him while he was at work and killed him on the spot. Verdict -- Accidental death.