The day of 9 Thermidor (27 July 1794) is universally acknowledged as a major turning-point in the history of the French Revolution. At 12.00 midnight, Maximilien Robespierre, the most prominent member of the Committee of Public Safety which had for more than a year directed the Reign of Terror, was planning to destroy one of the most dangerous plots that the Revolution had faced.

By 12.00 midnight at the close of the day, following a day of uncertainty, surprises, upsets and reverses, h ...