six o'clock
We can not tell how soon we may make the attempt , or how long we shall have to wait . Wednesdays and Saturdays are the only days on which it can be done ; and we must wait for a very rainy or foggy evening on one of those days . The present weather is in our favor , so do not leave the cottage empty day or night for a few weeks . '' Geoffrey concealed his letter , ate his breakfast when the six o'clock bell rang , and the bolts of five hundred cells shot back by one mighty stroke of a steam piston-rod , he paraded with his companions , and the four were marched off to their work at the monument . Sydney and the Duke walked together in rear of Geoffrey and Featherstone . The Duke , in order to keep up with the regulation pace , secretly clung to Sydney 's arm , which he dropped when the officer looked round and took again when the danger had passed . When they came to the tool-shed , the prisoners went in one by one for their tools , which were piled up and taken away day after day , by the same men in the same order .