Having broken through the first board, which I found to be two inches thick, I was stopped by a second which I judged to be as thick as the first. Tormented by the fear of new visitors I redoubled my efforts, and in three weeks I had pierced the three boards of which the floor was composed; and then I thought that all was lost, for I found I had to pierce a bed of small pieces of marble known at Venice as terrazzo marmorin. This forms the usual floor of venetian houses of all kinds, except the cottages, for even the high nobility prefer the terrazzo to the finest boarded floor. I was thunderstruck to find that my bar made no impression on this composition; but, nevertheless, I was not altogether discouraged and cast down. I remembered Hannibal, who, according to Livy, opened up a passage through the Alps by breaking the rocks with axes and other instruments, having previously softened them with vinegar. I thought that Hannibal had succeeded not by aceto, but aceta, which in the Latin of Padua might well be the same as ascia; and who can guarantee the text to be free from the blunders of the copyist? All the same, I poured into the hole a bottle of strong vinegar I had by me, and in the morning, either because of the vinegar or because I, refreshed and rested, put more strength and patience into the work, I saw that I should overcome this new difficulty; for I had not to break the pieces of marble, but only to pulverize with the end of my bar the cement which kept them together. I soon perceived that the greatest difficulty was on the surface, and in four days the whole mosaic was destroyed without the point of my pike being at all damaged. Below the pavement I found another plank, but I had expected as much. I concluded that this would be the last; that is the first to be put down when the rooms below were being ceiled. I pierced it with some difficulty, as, the hole being ten inches deep, it had become troublesome to work the pike. A thousand times I commended myself to the mercy of God. Those Free-thinkers who say that praying is no good do not know what they are talking about; for I know by experience that, having prayed to God, I always felt myself grow stronger, which fact amply proves the usefulness of prayer, whether the renewal of strength come straight from God, or whether it comes only from the trust one has in Him.