We have already mentioned several of the important pieces of church plate which were in use in mediaeval times. Censers, or thuribles, were common in all our ancient parish churches, sometimes of gold or silver, more usually of brass or latten, and were in the shape of a covered vase or cup, perforated so as to allow the fumes of burning incense to escape. Most of our English censers are now in museums, but several ancient ones are still in use in the private chapels of Roman Catholic families. Old inventories always mention a pyx, a box or vessel of gold or silver, in which the Host was reserved for the sick and infirm. It often resembles a chalice, except that instead of the bowl there is a covered receptacle for the Host. A beautiful specimen was dug up a few years ago in the churchyard of Yateley, Hants. Another vessel was the monstrance, in which the Blessed Sacrament was carried in procession, and exposed on the altar. The form varied. Sometimes monstrances were made in the shape of a tower, or a covered chalice; sometimes in the form of images carrying silver pyxes, elaborately ornamented with many jewels. Processions were always a great feature of mediaeval worship; hence the monstrance was frequently in use, especially on such occasions as the celebrations of Corpus Christi Day. Holy oil was much used in the services, as in the Roman Catholic Church at the present time. It was blessed by a bishop on Maundy Thursday, and used in Baptism, Confirmation, and Extreme Unction, as well as at the Consecration of Churches, Ordination, and the Coronation of Kings. The vessel for holding the oil was an important piece of church plate, and was called a chrismatory. Usually there were three distinct vessels, one for holding the oil for the sick, a second for use at confirmations, and a third for the baptismal oil. Sometimes these vessels are labelled with the words EXT. UNC., CAT., and CHR., according to the recommendation of St. Charles Borromeo, in order that each oil might be kept for its proper use, and that no confusion might arise. The pax was a small tablet of silver or other precious metal, used for giving the kiss of peace during High Mass. The celebrant kissed the tablet, and held it aloft before all the people. It was usually adorned with a representation of the _Agnus Dei_. Of the cruets containing wine and water for the celebration we have already written. Then there was a sacring bell, often made of silver, which was rung during the service at the time of the elevation of the Host, and at the sound the congregation knelt.