Sentence:  The most appropriate mode of ordering the holy vessels at this part of the service, previously to preparing them for the communion, is for the <WSD>celebrant</WSD> to place both the patten and the chalice in the middle of the altar, in a line with himself, the chalice behind and the patten in front; for they are presented before God as one Eucharist. 
Meaning of the word marked with <WSD> tags:  A person who officiates at a religious ceremony, especially a marriage or the Eucharist.