In the existing research on the religious history of the cult centre in Janów Lubelski it has been assumed that the manuscript presently kept in the Provincial Archives of the Dominican Fathers in Cracow is the original Miraculum written since 1670. This argument has been based on similarity (or claimed identity) of the contents of the Cracow and Janów manuscripts. The date when the manuscript which is now in Cracow was removed from Janów – around 1840 – has not been taken under consideration. In 1845 a copy of the manuscript in the Dominican Monastery in Janów was made and following (remaining) copies were made from it. The fact that the manuscript was not in Janów already in the 1840s excludes a possibility of copying it in 1845. In the light of chronological research the Cracow manuscript is not the original of the Miraculum from Janów but a copy made after 1802.