Then , Borge was in Costa Rica with Silvio Mayorga ; they thought Fonseca had perished .
The results were disastrous on July 24 , 1959 , when Fonseca was gravely injured .
Borge was in Costa Rica with Silvio Mayorga ; they thought Fonseca had perished .
The results were disastrous on July 24 , 1959 , when Fonseca was gravely injured .