Veronica was summoned to depart from Jerusalem and to go to Rome with the Sudarium of Jesus Christ, at this epoch, by order of Ceasar and by the intervention of Volusian, a valiant soldier and well known at court. The Emperor was confined to his bed with serious illness. He had been informed by Pilate of the great marvels wrought by Jesus, and he had sent ambassadors to Judea in the hope of obtaining a cure. The messengers found that Jesus had been already crucified. When the Jews sought to deceive them by relating the fable of His body having been carried away by His disciples, Veronica contradicted their falsehoods , and, showing the messengers the impression of His most Holy Face upon her veil , offered to go with them to Rome, promising that, on seeing it, the Emperor would be cured. Having then placed the precious veil in a reliquary, she embarked with the ambassadors, and arrived at Rome, where she was presented to the Emperor. As soon as he had received the holy woman, and had touched the effigy of the Christ, he was completely cured. In consequence of this miracle, Veronica was held in great esteem by the Emperor. 
Volusian, the officer who was commissioned by the Emperor was also of cured an infirmity of long standing by means of the miraculous veil.
The Veil was than given to St. Clement, who was at that time the assistant and the coadjutor of St. Peter and who later on was his third successor.

The Latin word Sudarium signifies a handkerchief used for wiping away sweat. Such is the original meaning of the word.
Fr Janvier digging through ancient archives and manuscripts in Rome put all this into a historical book on devotion to the Holy Face which he published in 1888 he was the first director of the Archconfraternity of the Holy Face.