six o'clock
`` Twenty-five pounds , '' he said ; `` that will be enough to throw the water fifty or sixty yards on a level , and the door of the winding-engine 's not more than thirty , so I can hold them both if they try to break in there . '' He again banked up the fires , and sat thinking . Harry would be at the magistrate 's by a quarter to six . By six o'clock Sir John could be on his way to Birmingham for troops ; fifteen miles to drive -- say an hour and a half . Another hour for the soldiers to start , and three hours to do the nineteen miles to the Vaughan , half-past eleven -- perhaps half an hour earlier , perhaps half an hour later . There was no fear but there was plenty of water . The boiler was a large one , and was built partly into , partly out of the engine-house .