Every revolution — even when studied closely by many authors of various tendencies, and at different times — long remains, fundamentally, a great Unknown. Centuries pass, and from time to time, men turn up new facts and unpublished documents among the remains of old uprisings. These discoveries upset our knowledge and ideas which we had supposed to be complete. How many works about the French Revolution of 1789 already existed when Kropotkin and Jaures unearthed from the ruins elements unknown until then, which threw unexpected light on that period? And didn’t Jaures say that the vast archives of the Great Revolution were hardly tapped? Generally, it is not known how to study a revolution, just as it is still not known how to write the history of a people. Moreover, authors, even when experienced and conscientious, commit errors and negligences which prevent the reader from getting a clear understanding of their theme. They take the trouble, for instance,...