Between 1877 and 1878, Schwarzfeld edited the Yiddish daily "Jüdischer Telegraf"; after this had ceased publication, he edited the Yiddish biweekly "Ha-Yoetz". During this period, Schwarzfeld became interested in advancing the cause of the non-emancipated Jewish community in the Kingdom of Romania: in 1878 he published his first pamphlet, "Chestia şcoalelor israelite şi a progresului israelit în România" ("The Issue of Israelite Schools and the Israelite Progress in Romania"), occasioned by a circular which the Alliance Israélite Universelle had issued calling for information regarding the state of education among the Romanian Jews.