In some manuscripts the letter is wrongly described as being addresed to the bishops of the Council of Tolosa in Gaul.
Hilarius and Elpidius went to Rome in the aftermath of the First Council of Toledo (AD 400), the decisions of which were not widely accepted in Spain; many bishops rejected the possibility of the reconciliation of the Priscillianists. The reference to the matter being discussed with the presbyters of Rome, and not with the synod of Italian bishops, is unique in the correspondence of Innocent. It is unclear whether this means that the matter was not important enough to bother the bishops, or the opposite; so pressing that it could not wait for them to come to Rome (Dunn 2015: 99).