Пишут, что миниатюры свитка перевернуты, чтобы быть видными публике во время служб:

http://www.bl.uk/manuscripts/Viewer.aspx?ref=add_ms_30337_f007r
http://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Add_MS_30337
..The miniatures are reversed in order to be seen when the roll was displayed over the front of the ambo (or pulpit) during the service.