Added to the Molinari Institutes online library: two 19th-century British individualist anarchist texts Henry Seymours Anarchy: Theory and Practice (1888) and Albert Tarns The State: Its Origin, Its Nature, and Its Abolition (1895). Thanks to Jonathan Martindale for locating and transcribing these texts!
Both Seymour and Tarn occasionally appeared in the pages of Benjamin Tuckers Liberty. Curiously, theres currently an institute named after Tarn; but its website doesnt have much information.