I read the testimony of torture victims and saw pictures of their injuries.
I opened handwritten, eye-witness accounts of summary trials and executions, of kidnappings and rapes.
Many of my co-workers were ex-political prisoners, people who had been displaced from their homes, or fled into exile, because they had the temerity to speak against their governments.
Visitors to our offices included those who had come to give information, or to try and find out what had happened to those they had left behind.
I shall never forget the African torture victim, a young man no older than I was at the time, who had become mentally ill after all he had endured in his homeland.
He trembled uncontrollably as he spoke into a video camera about the brutality inflicted upon him.
He was a foot taller than I was, and seemed as fragile as a child.
I was given the job of escorting him back to the Underground Station afterwards, and this man whose life had been shattered by cruelty took my hand with exquisite courtesy, and wished me future happiness.
And as long as I live I shall remember walking along an empty corridor and suddenly hearing, from behind a closed door, a scream of pain and horror such as I have never heard since. The door opened, and the researcher poked out her head and told me to run and make a hot drink for the young man sitting with her.
She had just had to give him the news that in retaliation for his own outspokenness against his country's regime, his mother had been seized and executed.