But the duchess fell ill at the last moment, and was unable to undertake the journey, of which Cardinal d'Albret brought word to Rome, where he arrived on February 7.
Ten days later Cesare set out with his father for Piombino, for which purpose six galleons awaited them at Civita Vecchia under the command of Lodovico Mosca, the captain of the Pontifical navy.

On these the Pope and his son embarked, upon their visit to the scene of the latest addition to Cesare's ever-growing dominions.
They landed at Piombino on February 21, and made a solemn entrance into the town, the Pope carried in state in the Sedia Gestatoria, under a canopy, attended by six cardinals and six singers from the Sixtine Chapel, whilst Cesare was accompanied by a number of his gentlemen.
They abode four days in Piombino, whence they crossed to Elba, for the purpose of disposing for the erection there of two fortresses--a matter most probably entrusted to Leonardo da Vinci, who continued in the ducal train as architect and engineer.
On March 1 they took ship to return to Rome; but they were detained at sea for five days by a tempest which seems to have imperilled the vessels.

The Pope was on board the captain's galley with his cardinals-in-waiting and servants, and when these were reduced by the storm and the imminent danger to a state of abject terror, the Pope--this old man of seventy-one--sat calm and intrepid, occasionally crossing himself and pronouncing the name of Jesus, and encouraging the very sailors by his example as much as by his words.
In Piombino Cesare had left Michele da Corella as his governor.

This Corella was a captain of foot, a soldier of fortune, who from the earliest days of Cesare's military career had followed the duke's fortunes--the very man who is alleged to have strangled Alfonso of Aragon by Cesare's orders.

He is generally assumed to have been a Spaniard, and is commonly designated as Michelotto, or Don Miguel; but Alvisi supposes him, from his name of Corella, to have been a Venetian, and he tells us that by his fidelity to Cesare and the implicit manner in which he executed his master's orders, he earned--as is notorious--considerable hatred.