Complex sentence: It was as an anarchist that he became a literary critic and journalist (his articles were later published in several collections), in 1895 covering the miner's revolt in Carmaux for the "Echo de Paris".
Split into simpler sentences: It was as an anarchist that he became a literary critic and journalist (his articles were later published in several collections). He then covered the miner's revolt in Carmaux (1895) for the "Echo de Paris".