Book of Hours DB Development

Another manuscript from the Richardson collection at Harvard's Houghton Library, Richardson 9 is a northern book, Use of Rome,  from circa 1500, written in a very practiced Batarde hand.  There are remarkably few errors in the completely-populated calendar and although it is not listed as such in the catalogues, the signs point to Bruges as the source of the calendar.  The start of October (f.12v below) shows an interesting listing on the 3rd, Sts. Ewald and Ewald, 2 priests who died on the same day, are listed as "Duorum Enwaldorum", "The Two Enwalds"