Note 14 — Chapter I · THE WEEK
Reading edition
Canon XXVI. ‘Errorem placuit corrigi, ut omni sabbati die superpositiones celebremus.’ On superpositio jejunii see D.C.A. It would seem that once a month (except in July and August, ob quorumdam infirmitatem) the added fast of Saturday was to be observed; Canon XXIII.