The grand procession of the Possesso took place a few days ago. This is a ceremony performed by every Pope, as soon as conveniency will permit, after the Conclave has declared in his favour. It is equivalent to the coronation in England, or the consecration at Rheims. On this occasion, the Pope goes to the Basilica of St. John Lateran, and, as the phrase is, takes possession of it. This church, they tell you, is the most ancient of all the church............