At the age of 64, he started a series of fifteen portraits which poked fun at or ridiculed politicians and monarchs from various countries.
He made their effigies out of tropical seashells, primarily mollusc shells, which were held together with plaster, working without any concern for the result.
The portrait series included masks of Queen Victoria and the emperor William II.
He was not a trained artist, but nonetheless succeeded in producing, in a spontaneous way, works that showed his talent.
According to him, this was art produced by people who were not professionals, who operated outside the conventional aesthetic norms, and who did not belong to an artistic milieu.