A great attack upon the water-way was made on the night of the 10th-11th of April. The enemy came rushing in with a tremendous din, yelling, and beating tom-toms, but the defenders immediately sprang to their stations, and fired section-volleys from the parapets. These volleys caused them, as on other attacks, to retreat towards the bazaar, and with a loss of only one man wounded on the part of the defenders, this last assault of the enemy was beaten. On the following day it was noticed that the enemy began playing tom-toms and Pathan pipes, in the summer-house at night, and shouting abuse at intervals. At this time, large parties of the enemy were seen moving away towards Mastuj, and the garrison began speculating upon the approach of a force from Gilgit to their relief. The enemy were indeed moving off to oppose Colonel Kelly, who had now crossed the Shandur Pass and reached Mastuj on his way to Chitral. On the evening of the 16th of April, it having struck the defenders that the tom-toming, which was so constantly kept up in the summer-house, was intended to drown the sound of the picking of a mine, sentries in the gun tower were warned to be on the alert, and to listen intently. It was thought quite possible that the enemy might have the intention of digging a mine from the summer-house in towards the tower, and right under it, so as to be able to blow it up, and effect an entrance to the fort. At midnight one of the sentries in the lower story of the gun tower, reported that he heard the noise of picking. Captain Townshend himself went up, but could hear nothing. But about 11 A.M. on the morning of the 17th, the native officer in the gun tower reported to him that he could hear the noise of picking quite distinctly. Captain Townshend accordingly again went up, and there could now be no mistake that a mine was being made, and that it had reached to within twelve feet of the walls of the fort. Dr. Robertson came up and listened too; and both officers agreed that the only thing to be done was to rush the summer-house, and destroy the mine, for there was no time to construct a counter-mine, and the enemy's plan must be frustrated at once.