If you hear the murmur of water beneath, go a little farther, and listen again.

If you still hear the sound, you are in the right direction.

Every few yards you must stop, lie down, and hearken.

If, listening thus, at any time you hear no sound of water, you are out of the way, and must hearken in every direction until you hear it again.

Keeping with the sound, and careful not to retrace your steps, you will soon hear it louder, and the growing sound will lead you to where it is loudest: that is the spot you seek.
There dig with the spade I will give you, and dig until you come to moisture: in it lay the hand, cover it to the level of the desert, and come home .-- But give good heed, and carry the hand with care.