Complex sentence: In 1968, Higgins revised Constance Garnett's 1924 translation of Alexander Herzen's memoirs, making many amendments and reinstating passages suppressed in the original edition.
Split into simpler sentences: In 1968, Higgins's revised edition of Constance Garnett's 1924 translation of Alexander Herzen's memoirs was published. Higgins made many amendments and reinstated passages suppressed in the original edition.