The first result of co-operation and consultation between Cranmer and Bucer was the Ordinal, the liturgy for the ordination of priests. This was missing in the first Prayer Book and was not published until 1550. Cranmer adopted Bucer's draft and created three services for commissioning a deacon, a priest, and a bishop. In the same year, Cranmer produced the "Defence of the True and Catholic Doctrine of the Sacrament of the Body and Blood of Christ", a semi-official explanation of the eucharistic theology within the Prayer Book. It was the first full-length book to bear Cranmer's name on the title-page. The preface summarises his quarrel with Rome in a well-known passage where he compared "beads, pardons, pilgrimages, and such other like popery" with weeds, but the roots of the weeds were transubstantiation, the corporeal real presence, and the sacrificial nature of the mass.