Not long ago, we walked to Long Crendon church. I was fascinated by two eighteenth century paintings; one of Moses, holding the Tablets of the Law; the other of Aaron, wearing a mitre, the breast-plate, the bells, and holding a smoking thurible.
Before the church was regothicised under the Victorians, these pictures clearly stood at each end of the Ten Commandments, which in pre-Tractarian days stood behind and above the Altar. Moses was presumably on the South side, since he is pointing with his right hand to the (now missing) Commandments.
I was intrigued to imagine the scene: the priest, wearing voluminous surplice and (if he was a gentleman) a red silk MA hood and a neat powdered wig, kneeling at the North End of the Altar to celebrate the Prayer Book Communion Office, with, above his head, the mitred, bell-adorned, Aaron, waggling incense. I wondered what effect these juxtapositions had on the imaginations of eighteenth century farmworkers ...
It is interesting to recollect that this iconography taken strictly suggests a notion of the Sacrifice of the Mass (aligning it narrowly with the Jewish sacrificial system) different from that of the Canon Romanus (which carefully alludes to pre-Mosaic sacrifice). Other texts in the old sacramentaries refer, of course, to the Eucharist as the fulfilment of the 'differentias hostiarum'.