sentences:  He was abruptly released in April 1919; later that year he authored his first book, "Factory Echoes", and enrolled at Ruskin College in Oxford.While at Ruskin, Fox became the editor of "New Oxford" and gained a reputation as a labour journalist.He was invited to Soviet Russia in 1921 to observe the results of the recent Russian Revolution, and in 1922 he visited Dublin and established contacts with leading leftist figures there.