It was several days before he recovered from the shock and the run combined, and all that time he behaved in such a strange manner that his wife and daughter were convinced that he was rapidly going mad. He would sit for hours together staring before him, and if a question was put to him, seldom gave a sensible answer. He scarcely ate any food, and if he did fall asleep, he talked about money-bags, and flung the blankets right and left, imagining that he was digging the earth out of the hole.
In this extremity the poor woman felt that the matter was beyond her skill, and she hastened to consult a German doctor famous for his learning. But the result was very different from what she had expected. At the doctor's first interview with Wolfert he questioned the patient closely as to all that he had seen and heard of the treasure, and at length told him that if he was ever to find it, it was necessary to proceed with the utmost caution and to observe certain ceremonies.
'You can never dig for money except at night,' ended the doctor, 'and then you must have the help of a divining rod. As I have some experience in these matters, you had better let me join in the search. If you agree to this, you can leave all preparations to me. In three days everything will be ready.'
Wolfert was delighted at this offer. Now, he thought, he was sure of success, and though he neglected his work as much as ever, he was so much brighter and happier than before that his wife congratulated herself on her wisdom in sending him to the doctor.
When the appointed night arrived Wolfert bade his women-kind go to bed and not to feel frightened if he should be out till daylight; and dressed in his wife's long, red cloak, with his wide felt hat tied down by his daughter's handkerchief, he set gaily out on his adventure.
The doctor was awaiting him, with a thick book studded with clasps under his arm, a basket of dried herbs and drugs in one hand, and the divining rod in the other. It was barely ten o'clock, but the whole village was fast asleep, and nothing was to be heard save the sound of their own footsteps. Yet, now and then it seemed to Wolfert that a third step mingled with theirs, and as he glanced round he fancied he saw a figure moving after them, keeping always in the shadow but stopping when they stopped, and proceeding when they proceeded.
Sam was ready for them and had put the spades and pickaxes in the bottom of his boat, together with a dark lantern. The tide was in their favour running fast up the Sound, so that oars were hardly needed. Very shortly they were passing the little inn where these strange adventures had begun; it was dark and still now, yet Wolfert thought he saw a boat lurking in the very place where he had beheld it on the night of the storm, but the shadow of the rocks lay so far over the water that he could be sure of nothing. Still, in a few minutes he was distinctly aware of the noise of oars, apparently coming from a long way off, and though both his companions were silent, it was evident from the stronger strokes instantly pulled by Sam that he had heard it also. In half an hour the negro shot his skiff into the little cave, and made it fast to the iron ring.
Even with the help of the notes he had taken, it was some time before Wolfert managed to hit on the exact spot where the treasure had been buried. After losing their way twice or thrice they reached the ledge of rock with the crosses on it, and at a sign from Wolfert the doctor produced the divining rod. This was a forked twig, and each of the forks was grasped in his hand, while the stem pointed straight upwards. The doctor held it at a certain distance above the ground, and frequently changed his position, and Wolfert kept the light of the lantern full on the twig, but it never stirred. Their hopes and their patience were nearly exhausted when the rod began slowly to turn, and went on turning until the stem pointed straight to the earth.
'The treasure lies here,' said the doctor.