 These agreements were later drawn up in detail by Prior John de Colum, who ordered them to be read annually by the prior, sub-prior and sacristan.In 1406 the priory selected one of its canons to celebrate divine service daily in the chapel of St. Catharine within the conventual section of the priory church for the soul of the late William Colchester, Abbot of Westminster, and for the souls of his father and mother; this canon was also to celebrate William Colchester's anniversary with chant and solemn tolling of bells in the parish church of St. Nicholas in Colchester as well as at the priory.6d.