Here is another big win for the YouTube suggestion algorithm, a very interesting lecture which explains the round of daily services at Sarum Cathedral, ca. 1500. It was given three years ago by Dr William Renwick, a professor in the department of music at McMaster University in Hamilton, Ontario, hosted by the Royal School of Church Music. In addition to a very thorough explanation of the daily round of liturgical services, he also shows something of how the choir was set up and used, the division of labor between the various groups within the chapter. The liturgical day which he goes through is Friday, December 19, the Ember day of Advent.