Read it through once

Of course we have been to the monster Church of St. Peter, frequently. I knew its dimensions. I knew it was a prodigious structure. I knew it was just about the length of the capitol at Washington--say seven hundred and thirty feet. I knew it was three hundred and sixty-four feet wide, and consequently wider than the capitol. I knew that the cross on the top of the dome of the church was four hundred and thirty-eight feet above the ground, and therefore about a hundred or may be a hundred and twenty-five feet higher than the dome of the capitol.--Thus I had one gauge. I wished to come as near forming a correct idea of how it was going to look, as possible; I had a curiosity to see how much I would err. I erred considerably. St. Peter's did not look nearly so large as the capitol, and certainly not a twentieth part as beautiful, from the outside.