The account from which we quote is virtually a semi-official procès-verbal, and was compiled by an eye-witness--Ubaldi, a canon of S. Peter’s, who was present when the discoveries were made, and who has left us his notes made on the spot and at the time. Singularly enough, the memoranda of Ubaldi lay disregarded, hidden among the Vatican archives until comparatively recently. They were found[132] by one of the keepers of these archives, and have been published lately by Professor Armellini. Before, however, giving the extracts from Ubaldi’s memoranda of the discoveries in the Cemetery of Anacletus in the year 1626, it will be of material assistance to the reader if a short account of the probable present position and state of the great apostle’s tomb is subjoined. It will be borne in mind that the excavations in connection with Bernini’s baldachino were carried out close to the tomb in question. The vault, in which we believe rests the sarcophagus which contains the sacred remains of the apostle, lies now deep under the high altar of the great church. It was always subterranean, and no doubt from the earliest days was visited by numbers of believers belonging not only to the Roman congregation, but by pilgrims from many other countries. Pope Anacletus, to accommodate these numerous pilgrim visitors, built directly over the tomb a little Memoria or chapel. This apparently was done by raising the walls of the vault beneath, and thus a chamber or chapel above was provided. This Memoria of Anacletus is generally known as the confession. Both these chambers now lie beneath the floor of the existing church. Originally the Memoria of Anacletus above the chamber of the tomb showed above ground; it is no doubt the “Tropæum” alluded to by the Presbyter Caius, _circa_ A.D. 210. Roughly, the height of the two chambers from the floor of the original vault to the ceiling of the Memoria built over it is some 32 feet. There is little difference in the height of each of these two chambers. The probable explanation of the details given in the _Liber Pontificalis_ of the works of Constantine the Great at the tomb is as follows: Both the chambers of the tomb--the original vault and the Memoria of Anacletus over it--were left intact, but with certain added features, simply devised with the view of strengthening and ensuring the permanence of the sacred spot and its contents. The whole of the chamber of the tomb was then filled up with solid masonry, except immediately above the sarcophagus.