Sentence:  If there would be former freemasons on the Committee of Public Safety during the Terror, they would be numbered too in the ranks of the "émigré" armies and counter-revolutionary Chouan rebels, and in <WSD>tumbrils</WSD> bound for the guillotine. 
Meaning of the word marked with <WSD> tags:  A cart used to carry condemned prisoners to their death, especially to the guillotine during the French Revolution.