Cesare Lombroso

Mon enquète sur la transmission de la pensée

Annales des sciences psychiques, Vol. XVI, Paris 1904, pp. 257-275.

Gustave Verbeek

The Thrilling Adventure of the Dragon

New York Herald, N. 29, New York 8 may 1904.

Gustave Verbeek

The Fairy Palace

New York Herald, N. 33, New York 5 june 1904.

Gustave Verbeek

Exciting Times at the Sea Shore

New York Herald, N. 36, New York 26 july 1904.

Gustave Verbeek

The Mermaid and the Floating Mine

New York Herald, N. 37, New York 3 july 1904.

Gustave Verbeek

A Fish Story

New York Herald, N. 41, New York 31 july 1904.