Uff... this people is too old. I don't know their stories, except Di Stefano's one. In 1952, Barça was the dominating team in Spain and we had the best European player of that moment: Kubala. It was the era of "Les Cinc Copes" (The five cups) and Real Madrid didn't have won a title in 20 years.
Samitier, then Barça Sports Director, watched Di Stéfano playing with the Millonarios of Bogotá. The owner of the player was River Plate though. Di Stefano, who had problems with River, decided to break unilaterally his contract with River to play with Millonarios. He could do this because Colombia wasn't in FIFA back then.
So Barcelona paid a record amount of 3 million $ (one of them bought in a foreign country, which wasn't allowed by Spain at that time) to River Plate to sign the player. Di Stefano was presented in Barcelona and he played several friendly matches with us, while the club was solving all the "papers".
Barcelona went to play to Venezuela in Caracas. That day a Catalan flag waved in the stadium and the Spanish ambassador threatened the Barça president, Enric Martí, for this issue. Also the president of Millonarios told Martí that he would give the "rights" of the player to Barça, if the team played 2 friendly matches against his team. Martí didn't accept it. Santiago Bernabeu (Madrid's president) had been informed all this time by the Spanish government, so he sent someone to talk with Millonarios' president to sign Di Stefano.
When Barça came back to Barcelona, there was a car of the Politic-Social Police to take Enric Martí to Madrid. The president of the Spanish FA, the fascist Armando Muñoz, tried to force him to renounce to Di Stefano. He also talked in the name of the Spanish government of Franco telling him that they knew all what had happened with the Catalan flag, the way of payment of the signing and he also told him that the "machine of the state" would go against his personal goods. Besides, every 15 min., the maximum Sports responsible of the fascist regime to support the president of the FA. They made a proposal: Di Stefano had to play one year in Barcelona and another one in Madrid. Martí accepted, scared by the power of the fascists.
When he came back to Barcelona, he explained all what had happened to the Board. All of them resigned, except the members of Falange (Franco's party) that controlled the club. Martí resigned 2 days later.
That's why the regime of Franco used their power to steal Di Stefano to Barcelona and give him to Real Madrid, creating their national-madridismo. Recall that Barça was a danger for the unity of Spain and a threat against the regime.