The introduction to his first volume of Actes et paroles, ranging in date from 1841 to 1851, is dated in June 1875; it is one of his most earnest and most eloquent appeals to the conscience and intelligence of the student.
The policy of indeterminate sentence and paroles was adopted in 1897 in the two prisons and the reformatory.
The terms were: "the efficers to give their individual paroles not to take up arms against the government of the United States until properly exchanged, and each company or regimental commander to sign a like parole for the men of their commands,".
Besides a number of archaeological works, especially in the department of numismatics, he published a compilation from the Arabic, Persian and Turkish, entitled Paroles remarquables, bons mots et maximes des orientaux (1694), and a translation from an Arabic manuscript, De l'origine et du progres du café (1699).
Among his other works may be named Paroles d'un revolte (1884); La Conquete du pain (1888); L' Anarchic: sa philosophie, son ideal (1896); The State, its Part in History (1898); Fields, Factories and Workshops (1899); Memoirs of a Revolutionist (1900); Mutual Aid, a Factor of Evolution (1902); Modern Science and Anarchism (Philadelphia, 1903); The Desiccation of Asia (1904); The Orography of Asia (1904); and Russian Literature (1905).