 After the Cardinal Datary came the "Subdatary" (""Subdatarius""), a prelate of the Roman Curia who assisted the Datary and assumed almost all of the faculties of the Datary as his substitute on occasion.After the Subdatary came a number of subordinate officials who, as De Luca stated, had enigmatical and sibyllic titles, e. g. the "Prefect of the "Per Obitum"", "Prefect of the "Concessum"", "Cashier of the "Componenda"", and "Officer of the "Missis"".Pope Leo XIII reformed the organization of the Dataria to conform it to contemporary requirements.