What is "arrises"

Usage examples of "arrises".

And when the good fathers had reached the appointed place, the house of Bernard Kiernan and Co, limited, 8, 9 and 10 little Britain street, wholesale grocers, wine and brandy shippers, licensed fo the sale of beer, wine and spirits for consumption on the premises, the celebrant blessed the house and censed the mullioned windows and the groynes and the vaults and the arrises and the capitals and the pediments and the cornices and the engrailed arches and the spires and the cupolas and sprinkled the lintels thereof with blessed water and prayed that God might bless that house as he had blessed the house of Abraham and Isaac and Jacob and make the angels of His light to inhabit therein.