For this reason the crown prince had written to Wilhelmine that she should not expect him until the following morning, and he did not quit his room the entire day, with excited expectation awaiting the summons. As evening set in the prince was cast down, and quite of the opinion that the Invisibles did not deem him worthy to enter their pure presence, and thought that Wilhelmine must be the hinderance. Whilst he was reflecting whether to sacrifice his beloved to the salvation of his soul, the secret door gently opened, and two men, masked and wrapped in black cloaks, entered and placed themselves near the door. The prince did not remark their entrance, and was quite frightened as he chanced to turn, and saw these two immovable figures.
With quivering voice he demanded their mission.
In the same tone, as if one were an echo of the other, they answered, "We desire nothing, but you demand knowledge of the spirit-world, and would have its mysteries revealed to you, which the Invisibles will now grant you. Follow us, therefore!" They reopened the secret door; one of the masked preceded the prince, and the other followed him.
The prince shuddered at the thought that he might be rushing into some unknown danger, and intrusting himself to those who would misuse his confidence. He demanded to see their faces, declaring himself prepared to follow, when acquainted with his guides.
"It would then be better to remain," replied one of the masked. "He who lacks confidence is not worthy of it, and he who trusts only the Visibles, the Invisibles flee."The prince recognized the voice of Bischofswerder, and smiled, but he knew not that it was permitted him to hear it to inspire him with courage.
"Well, so let it be; the fathers shall see that I am a believer,"cried the prince.
Immediately one of the brothers put his own cloak, three-cornered hat, and mask upon his highness, still remaining cloaked and masked himself, much to the astonishment of the passive prince. "Come, now, the Invisibles await you," said one of the masked. The prince stepped courageously into the little corridor which led to the secret stairway, one brother preceding him, causing a soft light to illumine their path, the other following him.
In silence they reached the side-door of the palace, where a close carriage awaited them.
"Where are you taking me?" asked Frederick William, as he entered, followed by the two brothers.
"To the Invisibles," answered a strange voice.
Again the prince essayed to begin a conversation, his only response being, "Purify your heart and pray." Silently they galloped over paved and unpaved streets, the prince heartily repenting having been drawn into this adventure. He thought of his charming and beloved Wilhelmine, and half determined to give the command to drive to Charlottenburg. The fact of Bischofswerder being with him, and fearful of appearing weak and wanting in courage in the eyes of his friend and favorite, prevented him.
After several hours' drive, they stopped at the marble palace of Potsdam, near the one which the prince was accustomed to occupy. His highness looked cautiously around, and breathed more freely, as he felt that he was now surely among friends.
The white palace stood silent and deserted in the darkness, this palace at Potsdam being only used for the guests of the king. The carriage stopped at the side-door, where there was no sentinel, and they alighted, entering the palace, winding along the corridors in the same order as before, guided by the glimmering light of the one preceding. Solemn music, strange ringing sounds, fell upon the ear as they advanced. Sometimes they were sharp and cutting as glass, then threatening and penetrating as the wind, shrieking and moaning, causing one to be very nervous if not terrified.
The farther they proceeded the louder grew the sounds, and at intervals groans, moans and wailings were heard, as of those waiting and imploring for mercy.
One of the brothers now opened a door, and then placing themselves upon each side, the unknown voice announced to the prince that they had arrived at the long-sought-for goal.
"What have we come here for?" asked the prince.
"To behold that which you have many times petitioned to be permitted to see," replied Bischofswerder, gently encouraging and inspiring Frederick William. "The Invisibles have at last yielded to your wishes, and the spirits which you summon will appear. If your courage fails you, and you dread the presence of the departed, command to be reconducted to your palace, and we will obey; but renounce forever the sublime happiness of beholding the Invisibles and of holding communion with the spirit-world!""I fear not, but wish to be in the company of the spirits," answered the prince, proudly.