His first published work was "Bizkaya por su independencia" ("Biscay for its independence"), where he calls for the independence of the Biscay district from Castile-Spain ("as it was before 1200"), echoing like proposals put forward by Gipuzkoa's governmental representatives to the National Convention officials Pinet and Cavaignac in Getaria during the War of the Pyrenees (1793–1795).