about eleven o'clock at night
As I had been very careful to keep account of all the changes of cord which took place , I was able to tell exactly what was the depth we had reached , as well as the time it had taken . We had shifted the rope twenty-eight times , each operation taking a quarter of an hour , which in all made seven hours . To this had to be added twenty-eight pauses ; in all ten hours and a half . We started at one , it was now , therefore , about eleven o'clock at night . It does not require great knowledge of arithmetic to know that twenty-eight times two hundred feet makes five thousand six hundred feet in all -LRB- more than an English mile -RRB- . While I was making this mental calculation a voice broke the silence . It was the voice of Hans .