A biretta tip, or a tip of whatever type of headgear one likes, to the Rorate Caeli blog for a post announcing that the Vatican has made the contents of the Acta Apostolicae Sedis, the AAS, (and the former series Acta Sanctae Sedis, ASS) available on-line from the Vatican website here.
The AAS contains the official text of decrees from the pope and the Roman Dicasteries. This is a truly invaluable resource for students of Liturgy, Canon Law and Church History.
I was planning a trip tomorrow to visit the library of Allen Hall Seminary where the only accesible set of 'on the shelf' volumes of AAS now exist in London (as far as I am aware). I have been researching editiones typicae of the Missal and their promulgation in an attempt to resolve a question raised by a friend in Newcastle. The Vatican has saved me the hassle and the tube and bus fare!
Having briefly purused the 1920 volume on-line a few moments ago and was able to find an answer to a question posed to me about today's great feast by a valued customer in Ireland that it had hitherto taken me over five years not to find an answer.
A brilliant resource - thank you Vatican Official whoever you are for the hours of work clearly involved.