Nicole attached the parcel to another letter from a Canadian couple with stolen stones from the same site also in 2005, in which they indicated that they took them without thinking of the pain and suffering of those who lived in this part of the earth during the eruption of the blessings of Vesuvius.
The woman said she was 36, had twice had breast cancer and was asking for "God's forgiveness".
In addition to the stolen artefacts, which the travel agent handed over to police, the package contained a letter of confession in which Nicole expressed regret for her actions.
According to CNN, the woman, Nicole, sent back "two white mosaic tiles, two pieces of amphora vase and a piece of ceramic wall to the Archaeological Park of Pompeii", along with a letter citing her reason for doing it.
"We took them without thinking of the pain and suffering these poor souls experienced during the eruption of Vesuvius and the awful death they had" - said the letter - "We are sorry, please forgive us for making this bad choice!" She says she was 21-years-old at the time and wanted to have a piece of history "that no one could have".
"Please forgive my careless act that I did years ago". In her letter, she said she took them while visiting the historic city in 2005. In 79 A.D., the town was brought to an end when Mount Vesuvius erupted with an explosion a hundred thousand times the thermal energy released by the Hiroshima bombing. It was buried until it was rediscovered in the 16th century, which led to an understanding of how life used to be in ancient times.
"We're good individuals... I simply need to shake this curse off me and my household", she wrote.
A selection of letters and returned artifacts has been put on display at the Pompeii Antiquarium, she added, noting that, while the value of the artifacts was not significant, the letters were interesting from an anthropological perspective.
Nicole was in her 20s when she nicked the artefacts from the ancient city, which is now one of the most popular tourist destinations in Italy, with over 2.5 million annual visitors.
"We are sorry, please forgive us for making this awful choice". A number of these notes are now on display as a warning at the Pompeii Antiquarium. "May their souls rest in peace".