The Gibraltar- Rock Ghost

The encounter was told to me by someone who worked for the British Embassy and who is now retired was a close friend of my mother. They had been seconded to the Governors Residence, and compound that belonged to the British Government and Embassy in Gibraltar. The Residence on Top of the Rock was a site that is today called, ‘The Convent’, after a Spanish convent. The Residence was converted from its previous use, and still contains much of the original layout with the addition of working Government Offices.
The story, that the Convent was used by the Spanish Inquisition at its height, and was the residence of a Carmelite Nunnery. One of the young Nuns in training, who had taken her vow of silence, had an affair in Secret with a male lover outside.
When the affair was discovered as a punishment she was bricked up in a Section that was not used very often, behind a wall, and died of starvation, lack of water and oxygen. Strange things happened to this today, in parts of the Building, including the appearance of an apparition of the Young nun who was said to roam the site, looking for her Lover. Sometimes there were cold spots and unexplained noises, and the movement and displacement of objects in Offices. One night my mother’s friend had stayed late to get some extra work done, in the Office, to The Governor, she had finished putting the touches to a briefing and completed her work. All of the other colleagues had disappeared and left for their apartments and it was largely deserted. She had wrapped warmly and had locked up and had started her return journey which led past the Cobbled court yard. It led past a Wing of the building where it was alleged the Nun had been bricked up, it stood empty and the Long Corridor, came to two large Wooden Doors, with a metal Handle, which remained locked. On that night she had crossed close to the two Doors became aware of a presence, because of the noise. The Large Wooden Double Doors, were been rattled by someone on the other side. She saw the metal handle turn before falling back, as someone released there grip because they could not open. She looked at her watch and it was just before Midnight. Once it had occurred she headed off at a brisk pace, and broke into a run and did not look back to find out who was responsible.
To do this day she has no explanation for whoever or whatever was the cause. That part of the Wing remained Closed off, and stood empty, which was where the Nun had been bricked up. She assumes that she heard Her Ghost, which does not apparently rest.