Rizal continued writing while practicing medicine and working on his Borneo colonization project. He wrote several articles and pieces including translations of rights documents, appeals regarding injustice in Calamba, and plans for colonization. He co-founded the Philippine League in Hong Kong and wrote its constitution. In 1892, Rizal decided to return to Manila from Hong Kong to establish the league and discuss his colonization project, despite the secret case filed against him. He carried a passport from the Spanish consul but was unaware of the duplicity of Spanish plans against him upon his return.