For a time, the children of the families who had taken refuge with the tanner remained healthy. The visitors were lodged for the most part in the cellars, so as to be in shelter from the fire of the enemy's mortar; but John Whitefoot suggested to his cousin that the children would soon pine and sicken, unless they had air. The tanner gave his consent to John's establishing a shelter in the yard. A corner was chosen, and a number of casks were placed along by either wall; on these beams were laid, for it happened that the tanner had intended, shortly before the siege, to build a large shed, and had got the timber together for the purpose. On the timber, bark from the now disused pits was heaped to a depth of some feet, which would effectually break the fall of any shell which might light upon it, and, along the front of this low triangular building, two lines of sacks filled with tan were placed. These would suffice to prevent any fragment of a shell, which might fall and burst in the courtyard, from entering the shelter; save by the opening, about a foot deep, between the top of the sacks and the beams. When the whole was completed, John gathered the children there, and made it their headquarters, and established himself as captain of the castle, as he called it. The elders entered warmly into his plans. It was a great relief, to them, to have the house cleared of the eighteen or twenty children. Their mothers had no longer any anxiety for their safety, and the children themselves looked upon it as great fun. There was plenty of air here, and, in a short time, John persuaded the parents to allow the children to sleep, as well as to pass the day, in the shelter. Here he told them stories, constructed toys for them, and kept them amused and quiet, appointing as his lieutenants three or four of the oldest of the girls, who had the little ones under their special charge. John was rewarded, for his pains, by seeing that the children kept their health far better than did those of their neighbours, and, up to the end of May, not one of them had succumbed, although several of the parents had already fallen victims to dysentery and fever. Thus the month of May passed. With June, the hardships rapidly increased; but, on the 13th, shouts of joy were heard in the streets. John ran out to ascertain the cause, and learned that a fleet of thirty ships had appeared in Lough Foyle, and was approaching the city. The inhabitants, frantic with joy, ran to the walls, and both sides suspended their fire to watch the approaching fleet. Suddenly, the ships were seen to turn and sail away. The people could not believe that they were deserted; but, when they saw that the fleet was really making off, curses and cries of lamentation and grief rose from the crowd.