During his time in prison he had hear about an attack that the Turks were planning on Malta. Once he was freed from prison, instead of heading back to Eboli he went to Malta to warn them about the attack, which happened on the 22 may 1565, and was able to organise some groups of soldiers. The Ottoman army greatly outnumbered that of Malta. However Roberto Novella was able to keep spirits high with his encouraging speeches. After being hurt twice during battles he has a vision that the island would be liberated on the 8th of September, which turned out to be correct and he is to this day remembered as a saint for that.
Brother Roberto Novella finally returns to Eboli, but due to some accusation upon his return he is told to give up his vows. On April 29, 1578, through the intercession of the Duke William, he receives thanks from the new Pope Gregory XIII. At the end of 1580, the brother gets full freedom and, after twelve years in prison, returns to his Eboli, where he finds a tragic family situation: the father died, the mother old and poor, the poor and unmarried sister and brother Lucio unemployed. All he has left to do is to write to the Duke, asking him to help his family and to find a job with his brother. It is the last news of Father Roberto: it is assumed that, by now tired and weak after so many hardships, hard years of slavery and prison, the brother died in Eboli.