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 diagram is for a Sunday procession for the blessing of holy water, before a red altar bearing a picture of Christ rising from the tomb. The procession, lower on the page, is headed by a crucifer (acolyte or altar boy who carries a processional cross), followed by two taperers (acolytes carrying candles), a thurifer (acolyte carrying a thurible or incense container), two deacons (brown circles), a priest or bishop (blue circle) in red cope, and a boy with holy water.