I want to know the answer to the following question:
When was his last full day in Venice?
All the background I'm provided with is that "Roncalli left Venice for the conclave in Rome well aware that he was papabile,[b] and after eleven ballots, was elected to succeed the late Pius XII, so it came as no surprise to him, though he had arrived at the Vatican with a return train ticket to Venice.[citation needed]". Is that enough to answer the question?