Processions often take place before masses on Sundays and important feasts. The procession, accompanied with chants, may be made to another church (a station), for readings and prayers. The processions' hymns are sometimes assembled in a book called a processional. Made for an urban church dedicated to St Mary and with dependent suburban churches, this one may have been for Salisbury Cathedral, but one of its processions is adapted for the tradition (use) of Norwich and a procession with the relics of St Swithin suggests Winchester, too. A rare illustrated processional, it has diagrams indicating the position of participants. This page shows a diagram for a ceremony on Holy Saturday at the font of a stational church in which a litany was sung. To the right of the font, the paschal candle stands. It would be dipped in the water of the font. Flanking it, the oil of the catechumens and holy chrism would be poured into the font in ceremony of exorcism and purification. The open book (to the left of the bishop, who stands before the font) could be the gospel book or the litany. The ring shapes indicate the bishop and deacons. The objects would be carried by acolytes (incense thurible, cross, smaller candles) or deacons (oils, paschal candle, gospel book).