[1][6] In the summer following their marriage, they returned to Bulgaria, settled in Korçë and dedicated their efforts toward missionary work, teaching and humanitarian activities in surrounding villages.

[9] After studying theology, Cilka became a member of Korçë-based organizations that sought the creation of an Albanian state independent of the Ottoman Empire.

[3][4] In 1901, Katerina, 6 months pregnant, embarked on a regional tour at the invitation of her friend Ellen Maria Stone, an American Protestant missionary.

Ottoman authorities suspected Protestants of involvement and for a short time, Cilka was arrested on orders by the vali (governor) of Salonika on unfounded charges of being complicit in the kidnapping.

[3] Cilka served as director of the girls' school, later he was imprisoned by Ottoman authorities and the educational institution closed shortly thereafter in February 1904.