E. de Roberty (1843–1915) was a Russian sociologist and philosopher who was long active in France. Publicly available information about him is limited, and the details of his life remain little known to Chinese readers. The one work held in the collection, Auguste Comte et Herbert Spencer, nonetheless reveals his scholarly concerns: examining Comte and Spencer, the two theoretical forerunners, within the French sociological and positivist tradition, and comparing their sociological conceptions and philosophical foundations. His writing is characterized by theoretical synthesis and critical analysis, attending to conceptual clarification and the contrast of intellectual lineages rather than to the presentation of empirical material. Works of this kind had a certain reference value in the sociological debates of the late nineteenth and early twentieth centuries, and they offer later readers a clue to understanding the divergences between positivism and social evolutionism.