One unique litany during this service is the Ektenia for Those Preparing for Illumination (i.e., for those catechumens in the final stages of preparation for baptism on Pascha).
The Catholic Encyclopedia of 1912 said the vicariate had about 2,500,000 pagans, 7,000 Catholics, 12,000 catechumens, 30 White Fathers; 23 lay brothers and six Missionary Sisters of Notre-Dame-d'Afrique.