Our Lady did appear in Fatima on August 13, 1917, when the children were locked in jail

Freemasonry had given orders to suppress the Fatima affair in Portugal as quickly as possible. So, in the morning of August 13, 1917, around 9:00 a.m., several men arrived at the Marto residence to ask to see the children. Among them was the tinsmith, who falsely claimed to want to see the miracle. He nervously asked to see the children so that he could take them in his horse and cart to the place of the apparitions. The parents refused.

The administrator then asked if they all could go to the church rectory with the parents so he could talk to the children there. They arrived at the church and, at the request of the administrator, Father Ferreira asked the visionaries many questions. At the end of this meeting, the administrator forced the children to get into the tinsmith's cart. Francisco went in front and the two girls in the back. The horse took the direction of the Cova da Iria, but when it arrived on the road, it abruptly changed direction towards Vila Nova de Ourem.

An hour later, the triumphant tinsmith arrived at his house and locked the three children in a room, telling them that they could not come out until they had told the secret. His wife treated them kindly and let them play with her own children. Exhausting interrogation sessions began the next day at the tinsmith's office, but to no avail. Then they were put in the town jail, to pressure them to publicly admit to having lied.

But the children refused to talk. Soon the people demanded that they be freed, since they were held unjustly. So the authorities decided to release them. On August 15, the administrator admitted defeat and drove the children home.

Nevertheless, on August 13, the day of the children’s arrest, Our Lady did come to the Cova da Iria: 18,000 people were gathered there, waiting, when they heard a thunderclap, saw a sudden light, immediately followed by a small cloud that hovered for a few moments above the holm oak, then rose into the sky and disappeared. Then a rainbow appeared close to the ground (human height), coloring all the grass and trees with beautiful colors. Our Lady had shown that she had kept the appointed date and come, even in the children’s absence.

Translated and adapted from: https://laportelatine.org/spiritualite/apparitions/apparition-du-lundi-13-aout-1917-persecutions-maconniques-contre-les-enfants