nine in the evening
Engineer and cavalry troops were already on the field , the engineers having arrived first of all , in order to lay the grounds out for the work in hand . Artillery and Signal Corps men , and a small detachment of ordnance troops , were due to arrive before dark . By supper time the hard-worked soldiers had some right to feel tired . It was not until nine in the evening that the men were through for that day . Then a few of the men of best conduct were given passes to leave camp and visit Denver until midnight . Private Hinkey was not one of these men . He did not even want to go , for he had worked like a beaver , and was thoroughly tired out .