[1] He left the POI and joined the Italian Socialist Party (PSI) in 1893.

[2] He served as the municipal councilor in Biella in 1895 and as the director of the newspaper Corriere Biellese in 1896.

[1][3] He wrote about trade union topics in the newspaper Avanti and then directed a magazine entitled Vita workeria.

[1] In 1903, Rigola lost his sight completely as a result of an accident during his youth.

[1][2] Rigola launched a magazine entitled Il Lavoro in Biella in 1924.