Cobb conceived the idea that such a piece of work would, in all likelihood, remain undisturbed by any and every person for the period necessary for his long sleep. No sooner had this belief taken possession of him than he at once took measures to communicate with the gentleman who had charge of its construction. A Mr. Bennett was the supervising architect, and this gentleman was easily induced, for a consideration, to undertake the construction of a small chamber within the base of the pedestal. He also agreed that the chamber should be reached through the side by a hinged block of marble fitting perfectly, but movable with ease from the inside, and that the purpose for which it was constructed should never be made known by him. Mr. Bennett was not aware of Cobb's true intentions regarding the chamber; it was simply a contract between them that such a piece of work should be performed. Bennett was a man of his word, and was well known to Cobb, who placed the utmost confidence in him; yet, to make it still more binding, he placed him under a sacred oath not to enter the chamber after it was built, or communicate his knowledge of its existence to any living soul, nor to leave any information of it at his death. While the pedestal was being built, Bennett had one of the largest marble slabs taken out, at night, by workmen brought there blindfolded, and replaced upon hinges, so it would easily open and shut by the pressure of a finger on a concealed spring. This part of the work having been accomplished, it was very easy to carry out the remainder. The pedestal being finished and solid, he took workmen there every night, blindfolded, and opening the slab door, cut out the masonry, hauling away the material as fast as it was taken out. Cobb desired that the chamber should be as deep as possible below the center of the pedestal, for security; Bennett made it so by digging down, after entering the base, and lining the sides with heavy brick-work. The interior of the chamber, after construction, was fourteen by eighteen feet, and in height nine feet and six inches. The floor was made very smooth by a liberal use of Portland cement. The door was so constructed that after an inside catch had been set, it would lock itself upon being closed, and no amount of skill could open it without breaking the marble slab. There was no inlet for light, nor was there any entrance or exit for air. Such was the finished condition of the chamber, as turned over by Mr. Bennett to Cobb, on the 15th of November, 1887. Cobb had not been negligent in the meantime, but had gotten many of the necessary things into shape which he knew would be required, for his chamber was to have a great many and a great variety of instruments, all of which would be absolutely necessary to insure success. Nothing could be done before the 24th of November, for on that day the Statue of Liberty was to be unveiled and turned over to the city of San Francisco by Mr. Sutro.