Fuorilegge

As a result of taking the treasure of the Indios Blancos (from the previous adventure "Il mistero dell’idolo d’oro"), Mexico invades the southern part of Texas. Tex joins the regular American forces who manage to stop the Mexicans and the conflict turns into a guerilla war. Tex is tasked with uncovering a Mexican spy.

This is where he finds a suspicious magician: Steve Dickart accompanied by his sister.

The first appearance of Mephisto.
 

Tex was sentenced to death by hanging! Carson, who comes to visit him, is the only one who believes in his innocence and therefore helps him escape from prison, outlaw days follow, the goal: to catch Mephisto and acquit himself...

With 34 pages this is one of the shortest Tex adventures.

In search of Mephisto and his sister, Tex joins Montales, a man leading a rebellion against the corrupt Mexican government. Besides the final showdown with Mephisto, Tex decides to help fight injustice in Mexico and joins the revolution.

This story can also be seen as two separate adventures: in the first, Tex tracks down and captures Mephisto. In the second he stays with Montales, and leads the rioters to victory.