On the afternoon of Thursday, 12 December, British monitoring stations detected X Verfahren (sometimes called
X-Gerät)
radio beams being laid across northern England and calculated that the likely target of the coming raid would be Sheffield. At about 9:30pm, a line of bombs fell on Campo Lane and Vicar Lane, demolishing the West end of the
Cathedral. At about 10:50pm a 500 kg bomb fell on and destroyed the C&A and Burtons buildings opposite the Marples Hotel in
Fitzalan Square. At 11:44pm, The Marples Hotel itself received a direct hit. The death toll of this incident was 78, the single biggest loss of life in the attacks. Full details of the identities of the victims and the extensive police efforts made to ensure everyone was identified can be found in the
Sheffield City Archives. The deceased were later found in the cellar, a large concrete box with deep encasing floors and walls beneath the carriageway outside the Marples building. The majority of the bombs on this night fell on the city centre or residential districts, with the last bombs falling at 4:00am. ==15 December raid==