Muntakhab al-tawarikh 66.2.3

66.2.3

In spite of this his imagination used to run riot, and his ideas, in consequence of his infatuation, were excited to such a degree, that he used to go for half the night into an empty room and lay his ear upon the ground, and going on from there a few steps would spy about, and then return to his original post, suddenly he called the pioneers and said, "A noise has reached my ears, dig up the ground in this spot." When they excavated they discovered a mine which ‘Ali Quli Khan had laid from outside the fortress. The people who saw these mines said that from the side of the fort in whatever direction they struck into the mine they found the foundation of the wall of the fort reached the water, with iron rods, and pillars and baulks of wood arranged under its foundations, bound together for the purpose of strengthening them, with the sole exception of this place which had been excavated.