The rebbe rashab Helps An Agunah

One day, she awoke early with a nebulous feeling that something was very wrong. Maybe it was just that everything looked so desolate in the stark grayness of the morning. She got out of bed and looked around the one room dwelling. The children were sleeping soundly, huddled under the ragged blanket like a litter of kittens in the one bed they shared.
She never expected that her husband would leave, and without warning... She opened the heavy wooden door and allowed her eyes to wander across the empty yard. The fear in the pit of her stomach made her nauseous, and she walked inside and sat down on a chair. It was true -- he was gone.
The next day it was a little easier to think, to plan. She would travel to the Rebbe Rashab. Only the holy Rebbe would know how to help her out of this terrible situation. Sympathetic neighbors watched her little ones, and even lent her the money for the trip, and soon she was sitting nervously on the train traveling to the Rebbe's court.
When she alighted from the train, she had no trouble finding the Rebbe's synagogue, but gaining a private audience with the Rebbe was another thing altogether. Some had been waiting for days, some for weeks, some even longer. Finally, one man told her, "Your best chance is to write the Rebbe a letter. Explain the whole situation, and he will surely answer you."
The poor woman, now even more distraught, wrote the letter. The Rebbe's shamash (assistant) took it and promised to present it to the Rebbe at an opportune moment. Not more than a couple of days passed when the woman was called to the shamash . "Come quickly," she was told, "The Rebbe has answered your letter."
The woman came running to the Rebbe's residence. "Here," said the Rebbe's shamash, "here is your answer." She unfolded the sheet of paper and on it was written but one sentence: "Go to Warsaw."
What could it mean? she wondered. And how in the world would she get to Warsaw? It was wartime; she had no money; she had small children.
Perplexed, she returned to her town and showed the Rebbe's answer to the Chasidim there. "If the Rebbe says, 'Go to Warsaw,' then go to Warsaw you must," they concurred. They gathered money for the woman and soon she was sitting on the train to Warsaw.
When she arrived in the metropolis, she had no idea where to go or what to do, for the Rebbe had given her no further direction. Suddenly, she was stopped by a Chasid.
"What do you need?" he asked. She replied that she had come to find her husband. The Rebbe had sent her to Warsaw, but she had no clue where to begin her search. "Go to -- Street. There is a factory where many immigrants go to work. You will most likely find your husband there."
With nothing to lose, she made her way to that street and asked to speak to the foreman. He was a kind-hearted man and, after hearing her story, allowed her to search through the list of workers. Her eyes widened with shock as her husband's name leaped up at her from the page. She went to him and pleaded with him to return home with her. He remained adamant until she told him how she had managed to find him. If the Rebbe had sent his wife to him, then he would return home with her.
She decided it was only right to return to the Rebbe's court and thank him for the miracle he had done for her, and so she traveled there once more.
This time, as well, she was not permitted to enter the Rebbe's chambers. "Wait until the Rebbe comes out to pray, and then approach him," she was told. So, she waited by the door, mentally composing the words she would use to thank the Rebbe. Suddenly the door opened. Upon seeing the Rebbe's face she fell down in a dead faint.
The Chasidim surrounded her, all wanting to know what had happened. When she was revived she told them, "When I saw the Rebbe's face, I realized that the chasid who had suddenly appeared and helped me on the street in Warsaw was the Rebbe!" Word of this amazing happening spread like wildfire. The Chasidim calculated and figured and finally determined the exact time that this strange meeting had occurred.
It had been on a day when the Rebbe had not prayed publicly with the minyan as usual. The Chasidim had been concerned about his welfare, and one young student had gotten up the nerve to climb up a tree and peer into the Rebbe's room. He put his face near the window, and looked in. There stood the Rebbe, looking like nothing he had ever seen. The Rebbe's face was aflame and his eyes were peering into the distance, totally unseeing. The boy was so overcome by the sight that he lost his balance and fell to the ground.
This story was related by the one who had been that young student during World War I and had himself witnessed the events described here.